78823938816 has 108 divisors (see below), whose sum is σ = 259735879312. Its totient is φ = 22521120768.

The previous prime is 78823938803. The next prime is 78823938881. The reversal of 78823938816 is 61883932887.

78823938816 is a `hidden beast` number, since 7 + 8 + 8 + 239 + 388 + 16 = 666.

It is a super-2 number, since 2×78823938816² (a number of 23 digits) contains 22 as substring.

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

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2427571 + ... + 2459826.

Almost surely, 2^78823938816 is an apocalyptic number.

It is an amenable number.

78823938816 is an abundant number, since it is smaller than the sum of its proper divisors (180911940496).

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

78823938816 is a wasteful number, since it uses less digits than its factorization.

78823938816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4887426 (or 4887409 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 63.

The spelling of 78823938816 in words is "seventy-eight billion, eight hundred twenty-three million, nine hundred thirty-eight thousand, eight hundred sixteen".