77712300136 has 8 divisors (see below), whose sum is σ = 145710562770. Its totient is φ = 38856150064.

The previous prime is 77712300109. The next prime is 77712300167. The reversal of 77712300136 is 63100321777.

It can be written as a sum of positive squares in only one way, i.e., 73565712900 + 4146587236 = 271230^2 + 64394^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 77712300095 and 77712300104.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4857018751 + ... + 4857018766.

Almost surely, 2^77712300136 is an apocalyptic number.

It is an amenable number.

77712300136 is a deficient number, since it is larger than the sum of its proper divisors (67998262634).

77712300136 is a wasteful number, since it uses less digits than its factorization.

77712300136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9714037523 (or 9714037519 counting only the distinct ones).

The product of its (nonzero) digits is 37044, while the sum is 37.

The spelling of 77712300136 in words is "seventy-seven billion, seven hundred twelve million, three hundred thousand, one hundred thirty-six".