78735564912 has 160 divisors (see below), whose sum is σ = 211508962560. Its totient is φ = 25220208640.

The previous prime is 78735564899. The next prime is 78735564931. The reversal of 78735564912 is 21946553787.

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, 83141623 + ... + 83142569.

It is an arithmetic number, because the mean of its divisors is an integer number (1321931016).

Almost surely, 2^78735564912 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 78735564912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105754481280).

78735564912 is an abundant number, since it is smaller than the sum of its proper divisors (132773397648).

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

78735564912 is a wasteful number, since it uses less digits than its factorization.

78735564912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1591 (or 1585 counting only the distinct ones).

The product of its digits is 12700800, while the sum is 57.

The spelling of 78735564912 in words is "seventy-eight billion, seven hundred thirty-five million, five hundred sixty-four thousand, nine hundred twelve".