78869390502 has 64 divisors (see below), whose sum is σ = 184017600000. Its totient is φ = 22526068320.

The previous prime is 78869390461. The next prime is 78869390599. The reversal of 78869390502 is 20509396887.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 8085124 + ... + 8094872.

It is an arithmetic number, because the mean of its divisors is an integer number (2875275000).

Almost surely, 2^78869390502 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78869390502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92008800000).

78869390502 is an abundant number, since it is smaller than the sum of its proper divisors (105148209498).

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

78869390502 is a wasteful number, since it uses less digits than its factorization.

78869390502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13706 (or 13692 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 57.

The spelling of 78869390502 in words is "seventy-eight billion, eight hundred sixty-nine million, three hundred ninety thousand, five hundred two".