139518764500 has 24 divisors (see below), whose sum is σ = 304708982760. Its totient is φ = 55807505600.

The previous prime is 139518764477. The next prime is 139518764597. The reversal of 139518764500 is 5467815931.

It can be written as a sum of positive squares in 4 ways, for example, as 3353336464 + 136165428036 = 57908^2 + 369006^2 .

It is a congruent number.

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, 139518265 + ... + 139519264.

It is an arithmetic number, because the mean of its divisors is an integer number (12696207615).

Almost surely, 2^139518764500 is an apocalyptic number.

139518764500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139518764500 is an abundant number, since it is smaller than the sum of its proper divisors (165190218260).

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

139518764500 is a wasteful number, since it uses less digits than its factorization.

139518764500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279037548 (or 279037536 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 49.

The spelling of 139518764500 in words is "one hundred thirty-nine billion, five hundred eighteen million, seven hundred sixty-four thousand, five hundred".