252623154138 has 32 divisors (see below), whose sum is σ = 509457315840. Its totient is φ = 83506489920.

The previous prime is 252623154107. The next prime is 252623154143. The reversal of 252623154138 is 831451326252.

It is a self number, because there is not a number n which added to its sum of digits gives 252623154138.

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, 1617768 + ... + 1767036.

It is an arithmetic number, because the mean of its divisors is an integer number (15920541120).

Almost surely, 2^252623154138 is an apocalyptic number.

252623154138 is an abundant number, since it is smaller than the sum of its proper divisors (256834161702).

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

252623154138 is a wasteful number, since it uses less digits than its factorization.

252623154138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151622.

The product of its digits is 345600, while the sum is 42.

The spelling of 252623154138 in words is "two hundred fifty-two billion, six hundred twenty-three million, one hundred fifty-four thousand, one hundred thirty-eight".