77368428624 has 80 divisors (see below), whose sum is σ = 202784020992. Its totient is φ = 25413894144.

The previous prime is 77368428593. The next prime is 77368428647. The reversal of 77368428624 is 42682486377.

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, 4255297 + ... + 4273439.

Almost surely, 2^77368428624 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 77368428624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101392010496).

77368428624 is an abundant number, since it is smaller than the sum of its proper divisors (125415592368).

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

77368428624 is a wasteful number, since it uses less digits than its factorization.

77368428624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19444 (or 19438 counting only the distinct ones).

The product of its digits is 21676032, while the sum is 57.

The spelling of 77368428624 in words is "seventy-seven billion, three hundred sixty-eight million, four hundred twenty-eight thousand, six hundred twenty-four".