25163626461 has 4 divisors (see below), whose sum is σ = 33551501952. Its totient is φ = 16775750972.

The previous prime is 25163626447. The next prime is 25163626463. The reversal of 25163626461 is 16462636152.

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 25163626461 - 2¹⁴ = 25163610077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25163626463) 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, 4193937741 + ... + 4193937746.

It is an arithmetic number, because the mean of its divisors is an integer number (8387875488).

Almost surely, 2^25163626461 is an apocalyptic number.

It is an amenable number.

25163626461 is a deficient number, since it is larger than the sum of its proper divisors (8387875491).

25163626461 is an equidigital number, since it uses as much as digits as its factorization.

25163626461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8387875490.

The product of its digits is 311040, while the sum is 42.

The spelling of 25163626461 in words is "twenty-five billion, one hundred sixty-three million, six hundred twenty-six thousand, four hundred sixty-one".