767378816064 has 140 divisors (see below), whose sum is σ = 2599715790144. Its totient is φ = 219251079936.

The previous prime is 767378816047. The next prime is 767378816089. The reversal of 767378816064 is 460618873767.

It is a happy number.

767378816064 is a `hidden beast` number, since 76 + 7 + 378 + 81 + 60 + 64 = 666.

767378816064 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 767378815992 and 767378816010.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10537164 + ... + 10609739.

Almost surely, 2^767378816064 is an apocalyptic number.

It is an amenable number.

767378816064 is an abundant number, since it is smaller than the sum of its proper divisors (1832336974080).

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

767378816064 is a wasteful number, since it uses less digits than its factorization.

767378816064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21146934 (or 21146915 counting only the distinct ones).

The product of its (nonzero) digits is 56899584, while the sum is 63.

The spelling of 767378816064 in words is "seven hundred sixty-seven billion, three hundred seventy-eight million, eight hundred sixteen thousand, sixty-four".