77328378856 has 64 divisors (see below), whose sum is σ = 157531651200. Its totient is φ = 35443580928.

The previous prime is 77328378833. The next prime is 77328378857. The reversal of 77328378856 is 65887382377.

It is not an unprimeable number, because it can be changed into a prime (77328378857) 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, 2081016 + ... + 2117848.

It is an arithmetic number, because the mean of its divisors is an integer number (2461432050).

Almost surely, 2^77328378856 is an apocalyptic number.

It is an amenable number.

77328378856 is an abundant number, since it is smaller than the sum of its proper divisors (80203272344).

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

77328378856 is a wasteful number, since it uses less digits than its factorization.

77328378856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37258 (or 37254 counting only the distinct ones).

The product of its digits is 94832640, while the sum is 64.

The spelling of 77328378856 in words is "seventy-seven billion, three hundred twenty-eight million, three hundred seventy-eight thousand, eight hundred fifty-six".