778675056720 has 160 divisors (see below), whose sum is σ = 2670427367424. Its totient is φ = 186110937600.

The previous prime is 778675056713. The next prime is 778675056799. The reversal of 778675056720 is 27650576877.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1889692 + ... + 2264571.

Almost surely, 2^778675056720 is an apocalyptic number.

It is an amenable number.

778675056720 is an abundant number, since it is smaller than the sum of its proper divisors (1891752310704).

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

778675056720 is a wasteful number, since it uses less digits than its factorization.

778675056720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4154361 (or 4154355 counting only the distinct ones).

The product of its (nonzero) digits is 34574400, while the sum is 60.

The spelling of 778675056720 in words is "seven hundred seventy-eight billion, six hundred seventy-five million, fifty-six thousand, seven hundred twenty".