77177664896 has 48 divisors (see below), whose sum is σ = 155292379620. Its totient is φ = 38206118400.

The previous prime is 77177664871. The next prime is 77177664899. The reversal of 77177664896 is 69846677177.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77177664899) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1276175 + ... + 1335281.

Almost surely, 2^77177664896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77177664896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77646189810).

77177664896 is an abundant number, since it is smaller than the sum of its proper divisors (78114714724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77177664896 is an equidigital number, since it uses as much as digits as its factorization.

77177664896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59323 (or 59210 counting only the distinct ones).

The product of its digits is 149361408, while the sum is 68.

The spelling of 77177664896 in words is "seventy-seven billion, one hundred seventy-seven million, six hundred sixty-four thousand, eight hundred ninety-six".