78872352140 has 24 divisors (see below), whose sum is σ = 167900873280. Its totient is φ = 31116763008.

The previous prime is 78872352137. The next prime is 78872352157. The reversal of 78872352140 is 4125327887.

It is a Smith number, since the sum of its digits (47) 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 7 ways as a sum of consecutive naturals, for example, 27009620 + ... + 27012539.

It is an arithmetic number, because the mean of its divisors is an integer number (6995869720).

Almost surely, 2^78872352140 is an apocalyptic number.

It is an amenable number.

78872352140 is an abundant number, since it is smaller than the sum of its proper divisors (89028521140).

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

78872352140 is a wasteful number, since it uses less digits than its factorization.

78872352140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54022241 (or 54022239 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 47.

The spelling of 78872352140 in words is "seventy-eight billion, eight hundred seventy-two million, three hundred fifty-two thousand, one hundred forty".