879139139140 has 12 divisors (see below), whose sum is σ = 1846192192236. Its totient is φ = 351655655648.

The previous prime is 879139139117. The next prime is 879139139147. The reversal of 879139139140 is 41931931978.

It can be written as a sum of positive squares in 2 ways, for example, as 444731601924 + 434407537216 = 666882^2 + 659096^2 .

It is not an unprimeable number, because it can be changed into a prime (879139139147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21978478459 + ... + 21978478498.

It is an arithmetic number, because the mean of its divisors is an integer number (153849349353).

Almost surely, 2^879139139140 is an apocalyptic number.

It is an amenable number.

879139139140 is an abundant number, since it is smaller than the sum of its proper divisors (967053053096).

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

879139139140 is a wasteful number, since it uses less digits than its factorization.

879139139140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43956956966 (or 43956956964 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 55.

The spelling of 879139139140 in words is "eight hundred seventy-nine billion, one hundred thirty-nine million, one hundred thirty-nine thousand, one hundred forty".