139878306512 has 80 divisors (see below), whose sum is σ = 314995565184. Its totient is φ = 58929984000.

The previous prime is 139878306479. The next prime is 139878306563. The reversal of 139878306512 is 215603878931.

It is a super-2 number, since 2×139878306512² (a number of 23 digits) contains 22 as substring.

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, 13734062 + ... + 13744242.

Almost surely, 2^139878306512 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 139878306512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157497782592).

139878306512 is an abundant number, since it is smaller than the sum of its proper divisors (175117258672).

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

139878306512 is a wasteful number, since it uses less digits than its factorization.

139878306512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12268 (or 12262 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 53.

The spelling of 139878306512 in words is "one hundred thirty-nine billion, eight hundred seventy-eight million, three hundred six thousand, five hundred twelve".