78918825456 has 30 divisors (see below), whose sum is σ = 220863102200. Its totient is φ = 26306275104.

The previous prime is 78918825443. The next prime is 78918825497. The reversal of 78918825456 is 65452881987.

78918825456 is a `hidden beast` number, since 7 + 8 + 9 + 1 + 8 + 82 + 545 + 6 = 666.

It is a super-2 number, since 2×78918825456² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 78918825393 and 78918825402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 274023556 + ... + 274023843.

Almost surely, 2^78918825456 is an apocalyptic number.

It is an amenable number.

78918825456 is an abundant number, since it is smaller than the sum of its proper divisors (141944276744).

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

78918825456 is a wasteful number, since it uses less digits than its factorization.

78918825456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548047413 (or 548047404 counting only the distinct ones).

The product of its digits is 38707200, while the sum is 63.

The spelling of 78918825456 in words is "seventy-eight billion, nine hundred eighteen million, eight hundred twenty-five thousand, four hundred fifty-six".