77091236051812 has 6 divisors (see below), whose sum is σ = 134909663090678. Its totient is φ = 38545618025904.

The previous prime is 77091236051761. The next prime is 77091236051827. The reversal of 77091236051812 is 21815063219077.

It can be written as a sum of positive squares in only one way, i.e., 68283019329316 + 8808216722496 = 8263354^2 + 2967864^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 77091236051812.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9636404506473 + ... + 9636404506480.

Almost surely, 2^{77091236051812} is an apocalyptic number.

It is an amenable number.

77091236051812 is a deficient number, since it is larger than the sum of its proper divisors (57818427038866).

77091236051812 is a wasteful number, since it uses less digits than its factorization.

77091236051812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19272809012957 (or 19272809012955 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 52.

The spelling of 77091236051812 in words is "seventy-seven trillion, ninety-one billion, two hundred thirty-six million, fifty-one thousand, eight hundred twelve".