79878061536 has 288 divisors, whose sum is σ = 265270602240. Its totient is φ = 20494301184.

The previous prime is 79878061511. The next prime is 79878061547. The reversal of 79878061536 is 63516087897.

It is a self number, because there is not a number n which added to its sum of digits gives 79878061536.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11956245 + ... + 11962923.

It is an arithmetic number, because the mean of its divisors is an integer number (921078480).

Almost surely, 2^79878061536 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 79878061536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132635301120).

79878061536 is an abundant number, since it is smaller than the sum of its proper divisors (185392540704).

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

79878061536 is a wasteful number, since it uses less digits than its factorization.

79878061536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6786 (or 6741 counting only the distinct ones).

The product of its (nonzero) digits is 15240960, while the sum is 60.

The spelling of 79878061536 in words is "seventy-nine billion, eight hundred seventy-eight million, sixty-one thousand, five hundred thirty-six".