253023255560161 has 4 divisors (see below), whose sum is σ = 256586963385024. Its totient is φ = 249459547735300.

The previous prime is 253023255560149. The next prime is 253023255560177. The reversal of 253023255560161 is 161065552320352.

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 a cyclic number.

It is not a de Polignac number, because 253023255560161 - 2²¹ = 253023253463009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253023255563161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1781853912325 + ... + 1781853912466.

It is an arithmetic number, because the mean of its divisors is an integer number (64146740846256).

Almost surely, 2^{253023255560161} is an apocalyptic number.

It is an amenable number.

253023255560161 is a deficient number, since it is larger than the sum of its proper divisors (3563707824863).

253023255560161 is an equidigital number, since it uses as much as digits as its factorization.

253023255560161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3563707824862.

The product of its (nonzero) digits is 1620000, while the sum is 46.

The spelling of 253023255560161 in words is "two hundred fifty-three trillion, twenty-three billion, two hundred fifty-five million, five hundred sixty thousand, one hundred sixty-one".