139401884660 has 48 divisors (see below), whose sum is σ = 304376078160. Its totient is φ = 53564636160.

The previous prime is 139401884627. The next prime is 139401884683. The reversal of 139401884660 is 66488104931.

It can be written as a sum of positive squares in 8 ways, for example, as 47543185936 + 91858698724 = 218044^2 + 303082^2 .

It is a junction number, because it is equal to n+sod(n) for n = 139401884599 and 139401884608.

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, 495761 + ... + 724280.

It is an arithmetic number, because the mean of its divisors is an integer number (6341168295).

Almost surely, 2^139401884660 is an apocalyptic number.

139401884660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139401884660 is an abundant number, since it is smaller than the sum of its proper divisors (164974193500).

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

139401884660 is a wasteful number, since it uses less digits than its factorization.

139401884660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220276 (or 1220274 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 50.

The spelling of 139401884660 in words is "one hundred thirty-nine billion, four hundred one million, eight hundred eighty-four thousand, six hundred sixty".