77612082691984 has 45 divisors (see below), whose sum is σ = 150704248528497. Its totient is φ = 38720850850752.

The previous prime is 77612082691939. The next prime is 77612082692009. The reversal of 77612082691984 is 48919628021677.

The square root of 77612082691984 is 8809772.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 63113046474384 + 14499036217600 = 7944372^2 + 3807760^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 17936693629 + ... + 17936697955.

Almost surely, 2^{77612082691984} is an apocalyptic number.

77612082691984 is the 8809772-nd square number.

It is an amenable number.

77612082691984 is a deficient number, since it is larger than the sum of its proper divisors (73092165836513).

77612082691984 is an frugal number, since it uses more digits than its factorization.

77612082691984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9680 (or 4838 counting only the distinct ones).

The product of its (nonzero) digits is 146313216, while the sum is 70.

The spelling of 77612082691984 in words is "seventy-seven trillion, six hundred twelve billion, eighty-two million, six hundred ninety-one thousand, nine hundred eighty-four".