78856012631584 has 96 divisors (see below), whose sum is σ = 158193113158080. Its totient is φ = 38682675532800.

The previous prime is 78856012631581. The next prime is 78856012631603. The reversal of 78856012631584 is 48513621065887.

It is not an unprimeable number, because it can be changed into a prime (78856012631581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7775955154 + ... + 7775965294.

It is an arithmetic number, because the mean of its divisors is an integer number (1647844928730).

Almost surely, 2^{78856012631584} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78856012631584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79096556579040).

78856012631584 is an abundant number, since it is smaller than the sum of its proper divisors (79337100526496).

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

78856012631584 is a wasteful number, since it uses less digits than its factorization.

78856012631584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17994 (or 17986 counting only the distinct ones).

The product of its (nonzero) digits is 77414400, while the sum is 64.

The spelling of 78856012631584 in words is "seventy-eight trillion, eight hundred fifty-six billion, twelve million, six hundred thirty-one thousand, five hundred eighty-four".