74905991923 has 16 divisors (see below), whose sum is σ = 92571116544. Its totient is φ = 59142648960.

The previous prime is 74905991921. The next prime is 74905991929. The reversal of 74905991923 is 32919950947.

It is a cyclic number.

It is not a de Polignac number, because 74905991923 - 2¹ = 74905991921 is a prime.

It is a super-2 number, since 2×74905991923² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74905991921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6690813 + ... + 6701998.

It is an arithmetic number, because the mean of its divisors is an integer number (5785694784).

Almost surely, 2^74905991923 is an apocalyptic number.

74905991923 is a deficient number, since it is larger than the sum of its proper divisors (17665124621).

74905991923 is a wasteful number, since it uses less digits than its factorization.

74905991923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13392882.

The product of its (nonzero) digits is 5511240, while the sum is 58.

The spelling of 74905991923 in words is "seventy-four billion, nine hundred five million, nine hundred ninety-one thousand, nine hundred twenty-three".