78707531580 has 48 divisors (see below), whose sum is σ = 220681868064. Its totient is φ = 20960029440.

The previous prime is 78707531533. The next prime is 78707531627. The reversal of 78707531580 is 8513570787.

It is an interprime number because it is at equal distance from previous prime (78707531533) and next prime (78707531627).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 850831 + ... + 938790.

It is an arithmetic number, because the mean of its divisors is an integer number (4597538918).

Almost surely, 2^78707531580 is an apocalyptic number.

It is an amenable number.

78707531580 is an abundant number, since it is smaller than the sum of its proper divisors (141974336484).

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

78707531580 is a wasteful number, since it uses less digits than its factorization.

78707531580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1790366 (or 1790364 counting only the distinct ones).

The product of its (nonzero) digits is 1646400, while the sum is 51.

The spelling of 78707531580 in words is "seventy-eight billion, seven hundred seven million, five hundred thirty-one thousand, five hundred eighty".