77379275572 has 24 divisors (see below), whose sum is σ = 135741158784. Its totient is φ = 38596189632.

The previous prime is 77379275563. The next prime is 77379275639. The reversal of 77379275572 is 27557297377.

It is a self number, because there is not a number n which added to its sum of digits gives 77379275572.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3263223 + ... + 3286849.

It is an arithmetic number, because the mean of its divisors is an integer number (5655881616).

Almost surely, 2^77379275572 is an apocalyptic number.

It is an amenable number.

77379275572 is a deficient number, since it is larger than the sum of its proper divisors (58361883212).

77379275572 is a wasteful number, since it uses less digits than its factorization.

77379275572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25575 (or 25573 counting only the distinct ones).

The product of its digits is 45378900, while the sum is 61.

The spelling of 77379275572 in words is "seventy-seven billion, three hundred seventy-nine million, two hundred seventy-five thousand, five hundred seventy-two".