77364786856 has 16 divisors (see below), whose sum is σ = 165781686240. Its totient is φ = 33156337200.

The previous prime is 77364786839. The next prime is 77364786857. The reversal of 77364786856 is 65868746377.

It is a junction number, because it is equal to n+sod(n) for n = 77364786791 and 77364786800.

It is not an unprimeable number, because it can be changed into a prime (77364786857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 690756970 + ... + 690757081.

It is an arithmetic number, because the mean of its divisors is an integer number (10361355390).

Almost surely, 2^77364786856 is an apocalyptic number.

It is an amenable number.

77364786856 is an abundant number, since it is smaller than the sum of its proper divisors (88416899384).

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

77364786856 is a wasteful number, since it uses less digits than its factorization.

77364786856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381514064 (or 1381514060 counting only the distinct ones).

The product of its digits is 284497920, while the sum is 67.

The spelling of 77364786856 in words is "seventy-seven billion, three hundred sixty-four million, seven hundred eighty-six thousand, eight hundred fifty-six".