74199491656 has 16 divisors (see below), whose sum is σ = 139213885500. Its totient is φ = 37075788864.

The previous prime is 74199491599. The next prime is 74199491693. The reversal of 74199491656 is 65619499147.

It can be written as a sum of positive squares in 2 ways, for example, as 73164840100 + 1034651556 = 270490^2 + 32166^2 .

It is a junction number, because it is equal to n+sod(n) for n = 74199491594 and 74199491603.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2981455 + ... + 3006238.

Almost surely, 2^74199491656 is an apocalyptic number.

It is an amenable number.

74199491656 is a deficient number, since it is larger than the sum of its proper divisors (65014393844).

74199491656 is a wasteful number, since it uses less digits than its factorization.

74199491656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5989248 (or 5989244 counting only the distinct ones).

The product of its digits is 14696640, while the sum is 61.

The spelling of 74199491656 in words is "seventy-four billion, one hundred ninety-nine million, four hundred ninety-one thousand, six hundred fifty-six".