25163114601561 has 4 divisors (see below), whose sum is σ = 33550819468752. Its totient is φ = 16775409734372.

The previous prime is 25163114601529. The next prime is 25163114601601. The reversal of 25163114601561 is 16510641136152.

It is a happy number.

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 25163114601561 - 2⁵ = 25163114601529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25163114601461) 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, 4193852433591 + ... + 4193852433596.

It is an arithmetic number, because the mean of its divisors is an integer number (8387704867188).

Almost surely, 2^{25163114601561} is an apocalyptic number.

It is an amenable number.

25163114601561 is a deficient number, since it is larger than the sum of its proper divisors (8387704867191).

25163114601561 is an equidigital number, since it uses as much as digits as its factorization.

25163114601561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8387704867190.

The product of its (nonzero) digits is 129600, while the sum is 42.

The spelling of 25163114601561 in words is "twenty-five trillion, one hundred sixty-three billion, one hundred fourteen million, six hundred one thousand, five hundred sixty-one".