77715736712 has 8 divisors (see below), whose sum is σ = 145717006350. Its totient is φ = 38857868352.

The previous prime is 77715736667. The next prime is 77715736783. The reversal of 77715736712 is 21763751777.

It can be written as a sum of positive squares in only one way, i.e., 77414158756 + 301577956 = 278234^2 + 17366^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4857233537 + ... + 4857233552.

Almost surely, 2^77715736712 is an apocalyptic number.

It is an amenable number.

77715736712 is a deficient number, since it is larger than the sum of its proper divisors (68001269638).

77715736712 is a wasteful number, since it uses less digits than its factorization.

77715736712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9714467095 (or 9714467091 counting only the distinct ones).

The product of its digits is 3025260, while the sum is 53.

The spelling of 77715736712 in words is "seventy-seven billion, seven hundred fifteen million, seven hundred thirty-six thousand, seven hundred twelve".