138780156252 has 24 divisors (see below), whose sum is σ = 324568229776. Its totient is φ = 46153214208.

The previous prime is 138780156209. The next prime is 138780156257. The reversal of 138780156252 is 252651087831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138780156257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13349323 + ... + 13359714.

Almost surely, 2^138780156252 is an apocalyptic number.

138780156252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138780156252 is an abundant number, since it is smaller than the sum of its proper divisors (185788073524).

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

138780156252 is a wasteful number, since it uses less digits than its factorization.

138780156252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26709477 (or 26709475 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 48.

The spelling of 138780156252 in words is "one hundred thirty-eight billion, seven hundred eighty million, one hundred fifty-six thousand, two hundred fifty-two".