74239805138 has 32 divisors (see below), whose sum is σ = 114486825600. Its totient is φ = 36092659456.

The previous prime is 74239805111. The next prime is 74239805153. The reversal of 74239805138 is 83150893247.

It is a super-2 number, since 2×74239805138² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6701468 + ... + 6712536.

It is an arithmetic number, because the mean of its divisors is an integer number (3577713300).

Almost surely, 2^74239805138 is an apocalyptic number.

74239805138 is a deficient number, since it is larger than the sum of its proper divisors (40247020462).

74239805138 is a wasteful number, since it uses less digits than its factorization.

74239805138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11746.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 74239805138 in words is "seventy-four billion, two hundred thirty-nine million, eight hundred five thousand, one hundred thirty-eight".