8697474339840 has 2112 divisors, whose sum is σ = 37630695997440. Its totient is φ = 1825988935680.

The previous prime is 8697474339833. The next prime is 8697474339847. The reversal of 8697474339840 is 489334747968.

It is a happy number.

8697474339840 is a `hidden beast` number, since 8 + 69 + 7 + 4 + 7 + 433 + 98 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (8697474339833) and next prime (8697474339847).

It is a tau number, because it is divible by the number of its divisors (2112).

It is a super-2 number, since 2×8697474339840² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8697474339847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 15900318447 + ... + 15900318993.

Almost surely, 2^{8697474339840} is an apocalyptic number.

8697474339840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8697474339840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18815347998720).

8697474339840 is an abundant number, since it is smaller than the sum of its proper divisors (28933221657600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8697474339840 is a wasteful number, since it uses less digits than its factorization.

8697474339840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748 (or 727 counting only the distinct ones).

The product of its (nonzero) digits is 877879296, while the sum is 72.

The spelling of 8697474339840 in words is "eight trillion, six hundred ninety-seven billion, four hundred seventy-four million, three hundred thirty-nine thousand, eight hundred forty".