78999039504 has 1080 divisors, whose sum is σ = 307958414400. Its totient is φ = 19495365120.

The previous prime is 78999039499. The next prime is 78999039517. The reversal of 78999039504 is 40593099987.

It is a happy number.

78999039504 is a `hidden beast` number, since 7 + 8 + 9 + 9 + 90 + 39 + 504 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 530194822 + ... + 530194970.

It is an arithmetic number, because the mean of its divisors is an integer number (285146680).

Almost surely, 2^78999039504 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 78999039504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153979207200).

78999039504 is an abundant number, since it is smaller than the sum of its proper divisors (228959374896).

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

78999039504 is a wasteful number, since it uses less digits than its factorization.

78999039504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 22044960, while the sum is 63.

The spelling of 78999039504 in words is "seventy-eight billion, nine hundred ninety-nine million, thirty-nine thousand, five hundred four".