74991315562680 has 256 divisors, whose sum is σ = 245693760883200. Its totient is φ = 18159897600000.

The previous prime is 74991315562661. The next prime is 74991315562687. The reversal of 74991315562680 is 8626551319947.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74991315562687) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8331438180 + ... + 8331447180.

It is an arithmetic number, because the mean of its divisors is an integer number (959741253450).

It is a 1-persistent number, because it is pandigital, but 2⋅74991315562680 = 149982631125360 is not.

Almost surely, 2^{74991315562680} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74991315562680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122846880441600).

74991315562680 is an abundant number, since it is smaller than the sum of its proper divisors (170702445320520).

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

74991315562680 is a wasteful number, since it uses less digits than its factorization.

74991315562680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15206 (or 15202 counting only the distinct ones).

The product of its (nonzero) digits is 97977600, while the sum is 66.

The spelling of 74991315562680 in words is "seventy-four trillion, nine hundred ninety-one billion, three hundred fifteen million, five hundred sixty-two thousand, six hundred eighty".