77131731076 has 9 divisors (see below), whose sum is σ = 134981501431. Its totient is φ = 38565587812.

The previous prime is 77131731073. The next prime is 77131731113. The reversal of 77131731076 is 67013713177.

The square root of 77131731076 is 277726.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77131731073) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 486021 + ... + 624883.

Almost surely, 2^77131731076 is an apocalyptic number.

77131731076 is the 277726-th square number.

It is an amenable number.

77131731076 is a deficient number, since it is larger than the sum of its proper divisors (57849770355).

77131731076 is an frugal number, since it uses more digits than its factorization.

77131731076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277730 (or 138865 counting only the distinct ones).

The product of its (nonzero) digits is 129654, while the sum is 43.

The spelling of 77131731076 in words is "seventy-seven billion, one hundred thirty-one million, seven hundred thirty-one thousand, seventy-six".