8557474899840 has 512 divisors, whose sum is σ = 28812086553600. Its totient is φ = 2156087476224.

The previous prime is 8557474899829. The next prime is 8557474899917. The reversal of 8557474899840 is 489984747558.

It is a super-2 number, since 2×8557474899840² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2625796131 + ... + 2625799389.

It is an arithmetic number, because the mean of its divisors is an integer number (56273606550).

Almost surely, 2^{8557474899840} is an apocalyptic number.

8557474899840 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 8557474899840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14406043276800).

8557474899840 is an abundant number, since it is smaller than the sum of its proper divisors (20254611653760).

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

8557474899840 is a wasteful number, since it uses less digits than its factorization.

8557474899840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4014 (or 4002 counting only the distinct ones).

The product of its (nonzero) digits is 3251404800, while the sum is 78.

The spelling of 8557474899840 in words is "eight trillion, five hundred fifty-seven billion, four hundred seventy-four million, eight hundred ninety-nine thousand, eight hundred forty".