16139968878 has 32 divisors (see below), whose sum is σ = 37285920000. Its totient is φ = 4603199360.

The previous prime is 16139968849. The next prime is 16139968883. The reversal of 16139968878 is 87886993161.

It is a Harshad number since it is a multiple of its sum of digits (66).

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, 7191378 + ... + 7193621.

It is an arithmetic number, because the mean of its divisors is an integer number (1165185000).

Almost surely, 2^16139968878 is an apocalyptic number.

16139968878 is an abundant number, since it is smaller than the sum of its proper divisors (21145951122).

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

16139968878 is a wasteful number, since it uses less digits than its factorization.

16139968878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14385032.

The product of its digits is 31352832, while the sum is 66.

The spelling of 16139968878 in words is "sixteen billion, one hundred thirty-nine million, nine hundred sixty-eight thousand, eight hundred seventy-eight".