77871294524 has 24 divisors (see below), whose sum is σ = 139427023680. Its totient is φ = 38041150784.

The previous prime is 77871294521. The next prime is 77871294541. The reversal of 77871294524 is 42549217877.

It is a self number, because there is not a number n which added to its sum of digits gives 77871294524.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77871294521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 717779 + ... + 819114.

It is an arithmetic number, because the mean of its divisors is an integer number (5809459320).

Almost surely, 2^77871294524 is an apocalyptic number.

It is an amenable number.

77871294524 is a deficient number, since it is larger than the sum of its proper divisors (61555729156).

77871294524 is a wasteful number, since it uses less digits than its factorization.

77871294524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1537189 (or 1537187 counting only the distinct ones).

The product of its digits is 7902720, while the sum is 56.

The spelling of 77871294524 in words is "seventy-seven billion, eight hundred seventy-one million, two hundred ninety-four thousand, five hundred twenty-four".