74684649472 has 26 divisors (see below), whose sum is σ = 149351073578. Its totient is φ = 37342322688.

The previous prime is 74684649469. The next prime is 74684649511. The reversal of 74684649472 is 27494648647.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 60115193856 + 14569455616 = 245184^2 + 120704^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 74684649472.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9112683 + ... + 9120874.

Almost surely, 2^74684649472 is an apocalyptic number.

It is an amenable number.

74684649472 is a deficient number, since it is larger than the sum of its proper divisors (74666424106).

74684649472 is an equidigital number, since it uses as much as digits as its factorization.

74684649472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18233581 (or 18233559 counting only the distinct ones).

The product of its digits is 65028096, while the sum is 61.

The spelling of 74684649472 in words is "seventy-four billion, six hundred eighty-four million, six hundred forty-nine thousand, four hundred seventy-two".