74520845136 has 120 divisors (see below), whose sum is σ = 219654924320. Its totient is φ = 23519662848.

The previous prime is 74520845111. The next prime is 74520845167. The reversal of 74520845136 is 63154802547.

74520845136 is a `hidden beast` number, since 7 + 4 + 52 + 0 + 84 + 513 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 74520845091 and 74520845100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5610375 + ... + 5623641.

Almost surely, 2^74520845136 is an apocalyptic number.

74520845136 is a gapful number since it is divisible by the number (76) 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 74520845136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109827462160).

74520845136 is an abundant number, since it is smaller than the sum of its proper divisors (145134079184).

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

74520845136 is a wasteful number, since it uses less digits than its factorization.

74520845136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15353 (or 15344 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The spelling of 74520845136 in words is "seventy-four billion, five hundred twenty million, eight hundred forty-five thousand, one hundred thirty-six".