78723293561856 has 176 divisors, whose sum is σ = 236962286855680. Its totient is φ = 25810915368960.

The previous prime is 78723293561833. The next prime is 78723293561863. The reversal of 78723293561856 is 65816539232787.

78723293561856 is a `hidden beast` number, since 7 + 8 + 7 + 2 + 3 + 2 + 9 + 3 + 561 + 8 + 56 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21652336 + ... + 25025391.

Almost surely, 2^{78723293561856} is an apocalyptic number.

It is an amenable number.

78723293561856 is an abundant number, since it is smaller than the sum of its proper divisors (158238993293824).

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

78723293561856 is a wasteful number, since it uses less digits than its factorization.

78723293561856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46677817 (or 46677793 counting only the distinct ones).

The product of its digits is 914457600, while the sum is 72.

The spelling of 78723293561856 in words is "seventy-eight trillion, seven hundred twenty-three billion, two hundred ninety-three million, five hundred sixty-one thousand, eight hundred fifty-six".