77307487792 has 20 divisors (see below), whose sum is σ = 149792629176. Its totient is φ = 38651325440.

The previous prime is 77307487787. The next prime is 77307487819. The reversal of 77307487792 is 29778470377.

It is a self number, because there is not a number n which added to its sum of digits gives 77307487792.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128208 + ... + 413584.

Almost surely, 2^77307487792 is an apocalyptic number.

It is an amenable number.

77307487792 is a deficient number, since it is larger than the sum of its proper divisors (72485141384).

77307487792 is a wasteful number, since it uses less digits than its factorization.

77307487792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302316 (or 302310 counting only the distinct ones).

The product of its (nonzero) digits is 29042496, while the sum is 61.

The spelling of 77307487792 in words is "seventy-seven billion, three hundred seven million, four hundred eighty-seven thousand, seven hundred ninety-two".