252602271561 has 4 divisors (see below), whose sum is σ = 336803028752. Its totient is φ = 168401514372.

The previous prime is 252602271539. The next prime is 252602271569. The reversal of 252602271561 is 165172206252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 252602271561 - 2¹⁴ = 252602255177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252602271569) 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 3 ways as a sum of consecutive naturals, for example, 42100378591 + ... + 42100378596.

It is an arithmetic number, because the mean of its divisors is an integer number (84200757188).

Almost surely, 2^252602271561 is an apocalyptic number.

It is an amenable number.

252602271561 is a deficient number, since it is larger than the sum of its proper divisors (84200757191).

252602271561 is an equidigital number, since it uses as much as digits as its factorization.

252602271561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84200757190.

The product of its (nonzero) digits is 100800, while the sum is 39.

The spelling of 252602271561 in words is "two hundred fifty-two billion, six hundred two million, two hundred seventy-one thousand, five hundred sixty-one".