78715214988 has 96 divisors (see below), whose sum is σ = 205434512640. Its totient is φ = 23312240640.

The previous prime is 78715214959. The next prime is 78715215037. The reversal of 78715214988 is 88941251787.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1061028 + ... + 1132788.

It is an arithmetic number, because the mean of its divisors is an integer number (2139942840).

Almost surely, 2^78715214988 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 78715214988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102717256320).

78715214988 is an abundant number, since it is smaller than the sum of its proper divisors (126719297652).

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

78715214988 is a wasteful number, since it uses less digits than its factorization.

78715214988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72087 (or 72085 counting only the distinct ones).

The product of its digits is 9031680, while the sum is 60.

The spelling of 78715214988 in words is "seventy-eight billion, seven hundred fifteen million, two hundred fourteen thousand, nine hundred eighty-eight".