138780737502 has 32 divisors (see below), whose sum is σ = 302998178304. Its totient is φ = 42026457600.

The previous prime is 138780737471. The next prime is 138780737519. The reversal of 138780737502 is 205737087831.

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, 608899 + ... + 805182.

It is an arithmetic number, because the mean of its divisors is an integer number (9468693072).

Almost surely, 2^138780737502 is an apocalyptic number.

138780737502 is an abundant number, since it is smaller than the sum of its proper divisors (164217440802).

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

138780737502 is a wasteful number, since it uses less digits than its factorization.

138780737502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1415584.

The product of its (nonzero) digits is 1975680, while the sum is 51.

The spelling of 138780737502 in words is "one hundred thirty-eight billion, seven hundred eighty million, seven hundred thirty-seven thousand, five hundred two".