74315538981 has 96 divisors (see below), whose sum is σ = 119009958912. Its totient is φ = 44482314240.

The previous prime is 74315538959. The next prime is 74315539019. The reversal of 74315538981 is 18983551347.

74315538981 is a `hidden beast` number, since 7 + 4 + 3 + 1 + 553 + 8 + 9 + 81 = 666.

It is not a de Polignac number, because 74315538981 - 2⁶ = 74315538917 is a prime.

It is a super-2 number, since 2×74315538981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74315538911) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 167754946 + ... + 167755388.

It is an arithmetic number, because the mean of its divisors is an integer number (1239687072).

Almost surely, 2^74315538981 is an apocalyptic number.

It is an amenable number.

74315538981 is a deficient number, since it is larger than the sum of its proper divisors (44694419931).

74315538981 is a wasteful number, since it uses less digits than its factorization.

74315538981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923 (or 920 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 54.

The spelling of 74315538981 in words is "seventy-four billion, three hundred fifteen million, five hundred thirty-eight thousand, nine hundred eighty-one".