778675972392 has 96 divisors (see below), whose sum is σ = 2167637472000. Its totient is φ = 252385314048.

The previous prime is 778675972331. The next prime is 778675972397. The reversal of 778675972392 is 293279576877.

778675972392 is a `hidden beast` number, since 7 + 7 + 8 + 6 + 7 + 597 + 23 + 9 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 778675972392.

It is not an unprimeable number, because it can be changed into a prime (778675972397) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 126484 + ... + 1254332.

It is an arithmetic number, because the mean of its divisors is an integer number (22579557000).

Almost surely, 2^778675972392 is an apocalyptic number.

778675972392 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 778675972392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1083818736000).

778675972392 is an abundant number, since it is smaller than the sum of its proper divisors (1388961499608).

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

778675972392 is a wasteful number, since it uses less digits than its factorization.

778675972392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128127 (or 1128120 counting only the distinct ones).

The product of its digits is 560105280, while the sum is 72.

The spelling of 778675972392 in words is "seven hundred seventy-eight billion, six hundred seventy-five million, nine hundred seventy-two thousand, three hundred ninety-two".