77707440368 has 80 divisors (see below), whose sum is σ = 163250667360. Its totient is φ = 35689586688.

The previous prime is 77707440353. The next prime is 77707440379. The reversal of 77707440368 is 86304470777.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24992798 + ... + 24995906.

It is an arithmetic number, because the mean of its divisors is an integer number (2040633342).

Almost surely, 2^77707440368 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 77707440368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81625333680).

77707440368 is an abundant number, since it is smaller than the sum of its proper divisors (85543226992).

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

77707440368 is a wasteful number, since it uses less digits than its factorization.

77707440368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5314 (or 5308 counting only the distinct ones).

The product of its (nonzero) digits is 5531904, while the sum is 53.

The spelling of 77707440368 in words is "seventy-seven billion, seven hundred seven million, four hundred forty thousand, three hundred sixty-eight".