77957777775977 has 16 divisors (see below), whose sum is σ = 90621037533312. Its totient is φ = 66276989425920.

The previous prime is 77957777775967. The next prime is 77957777775989.

77957777775977 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 77957777775977 - 2³⁸ = 77682899869033 is a prime.

It is a super-2 number, since 2×77957777775977² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77957777775967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1327634693 + ... + 1327693410.

It is an arithmetic number, because the mean of its divisors is an integer number (5663814845832).

Almost surely, 2^{77957777775977} is an apocalyptic number.

It is an amenable number.

77957777775977 is a deficient number, since it is larger than the sum of its proper divisors (12663259757335).

77957777775977 is a wasteful number, since it uses less digits than its factorization.

77957777775977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2655328288.

The product of its digits is 572012379225, while the sum is 98.

The spelling of 77957777775977 in words is "seventy-seven trillion, nine hundred fifty-seven billion, seven hundred seventy-seven million, seven hundred seventy-five thousand, nine hundred seventy-seven".