63691949399040 has 264 divisors, whose sum is σ = 220707456285888. Its totient is φ = 16983249223680.

The previous prime is 63691949399027. The next prime is 63691949399053. The reversal of 63691949399040 is 4099394919636.

63691949399040 is a `hidden beast` number, since 6 + 3 + 6 + 9 + 1 + 9 + 493 + 9 + 90 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (63691949399027) and next prime (63691949399053).

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

It is a self number, because there is not a number n which added to its sum of digits gives 63691949399040.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 726776025 + ... + 726863655.

It is an arithmetic number, because the mean of its divisors is an integer number (836013091992).

Almost surely, 2^{63691949399040} is an apocalyptic number.

63691949399040 is a gapful number since it is divisible by the number (60) 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 63691949399040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110353728142944).

63691949399040 is an abundant number, since it is smaller than the sum of its proper divisors (157015506886848).

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

63691949399040 is a wasteful number, since it uses less digits than its factorization.

63691949399040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103435 (or 103414 counting only the distinct ones).

The product of its (nonzero) digits is 306110016, while the sum is 72.

The spelling of 63691949399040 in words is "sixty-three trillion, six hundred ninety-one billion, nine hundred forty-nine million, three hundred ninety-nine thousand, forty".