77021910124 has 12 divisors (see below), whose sum is σ = 134792610624. Its totient is φ = 38509735664.

The previous prime is 77021910109. The next prime is 77021910127. The reversal of 77021910124 is 42101912077.

It is a self number, because there is not a number n which added to its sum of digits gives 77021910124.

It is not an unprimeable number, because it can be changed into a prime (77021910127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154492 + ... + 421795.

It is an arithmetic number, because the mean of its divisors is an integer number (11232717552).

Almost surely, 2^77021910124 is an apocalyptic number.

It is an amenable number.

77021910124 is a deficient number, since it is larger than the sum of its proper divisors (57770700500).

77021910124 is a wasteful number, since it uses less digits than its factorization.

77021910124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609704 (or 609702 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 34.

The spelling of 77021910124 in words is "seventy-seven billion, twenty-one million, nine hundred ten thousand, one hundred twenty-four".