74904821631 has 32 divisors (see below), whose sum is σ = 113079767040. Its totient is φ = 48994372800.

The previous prime is 74904821617. The next prime is 74904821647. The reversal of 74904821631 is 13612840947.

74904821631 is a `hidden beast` number, since 7 + 4 + 9 + 0 + 4 + 8 + 2 + 1 + 631 = 666.

It is not a de Polignac number, because 74904821631 - 2⁵ = 74904821599 is a prime.

It is a super-2 number, since 2×74904821631² (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 (74904821681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 276976 + ... + 475946.

It is an arithmetic number, because the mean of its divisors is an integer number (3533742720).

Almost surely, 2^74904821631 is an apocalyptic number.

74904821631 is a deficient number, since it is larger than the sum of its proper divisors (38174945409).

74904821631 is a wasteful number, since it uses less digits than its factorization.

74904821631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199244 (or 199238 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 74904821631 in words is "seventy-four billion, nine hundred four million, eight hundred twenty-one thousand, six hundred thirty-one".