77449291924 has 12 divisors (see below), whose sum is σ = 136238522644. Its totient is φ = 38523999744.

The previous prime is 77449291897. The next prime is 77449291949. The reversal of 77449291924 is 42919294477.

It can be written as a sum of positive squares in 2 ways, for example, as 15692071824 + 61757220100 = 125268^2 + 248510^2 .

It is a congruent number.

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, 50160687 + ... + 50162230.

Almost surely, 2^77449291924 is an apocalyptic number.

It is an amenable number.

77449291924 is a deficient number, since it is larger than the sum of its proper divisors (58789230720).

77449291924 is a wasteful number, since it uses less digits than its factorization.

77449291924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100323114 (or 100323112 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 58.

The spelling of 77449291924 in words is "seventy-seven billion, four hundred forty-nine million, two hundred ninety-one thousand, nine hundred twenty-four".