252601561477591 has 2 divisors, whose sum is σ = 252601561477592. Its totient is φ = 252601561477590.

The previous prime is 252601561477567. The next prime is 252601561477607. The reversal of 252601561477591 is 195774165106252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 252601561477591 - 2²⁵ = 252601527923159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252601561477501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126300780738795 + 126300780738796.

It is an arithmetic number, because the mean of its divisors is an integer number (126300780738796).

Almost surely, 2^{252601561477591} is an apocalyptic number.

252601561477591 is a deficient number, since it is larger than the sum of its proper divisors (1).

252601561477591 is an equidigital number, since it uses as much as digits as its factorization.

252601561477591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752000, while the sum is 61.

The spelling of 252601561477591 in words is "two hundred fifty-two trillion, six hundred one billion, five hundred sixty-one million, four hundred seventy-seven thousand, five hundred ninety-one".