78973587888 has 320 divisors, whose sum is σ = 238664724480. Its totient is φ = 22319311872.

The previous prime is 78973587871. The next prime is 78973587893. The reversal of 78973587888 is 88878537987.

It is a Harshad number since it is a multiple of its sum of digits (78).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1490067670 + ... + 1490067722.

It is an arithmetic number, because the mean of its divisors is an integer number (745827264).

Almost surely, 2^78973587888 is an apocalyptic number.

78973587888 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78973587888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119332362240).

78973587888 is an abundant number, since it is smaller than the sum of its proper divisors (159691136592).

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

78973587888 is a wasteful number, since it uses less digits than its factorization.

78973587888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241 (or 141 counting only the distinct ones).

The product of its digits is 1517322240, while the sum is 78.

The spelling of 78973587888 in words is "seventy-eight billion, nine hundred seventy-three million, five hundred eighty-seven thousand, eight hundred eighty-eight".