77715425376 has 240 divisors, whose sum is σ = 233213305248. Its totient is φ = 25382246400.

The previous prime is 77715425323. The next prime is 77715425399. The reversal of 77715425376 is 67352451777.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 31836316 + ... + 31838756.

Almost surely, 2^77715425376 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 77715425376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116606652624).

77715425376 is an abundant number, since it is smaller than the sum of its proper divisors (155497879872).

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

77715425376 is a wasteful number, since it uses less digits than its factorization.

77715425376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2707 (or 2690 counting only the distinct ones).

The product of its digits is 8643600, while the sum is 54.

The spelling of 77715425376 in words is "seventy-seven billion, seven hundred fifteen million, four hundred twenty-five thousand, three hundred seventy-six".