25617512053 has 4 divisors (see below), whose sum is σ = 29277156640. Its totient is φ = 21957867468.

The previous prime is 25617511991. The next prime is 25617512057. The reversal of 25617512053 is 35021571652.

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 25617512053 - 2²⁵ = 25583957621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25617512057) 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, 1829822283 + ... + 1829822296.

It is an arithmetic number, because the mean of its divisors is an integer number (7319289160).

Almost surely, 2^25617512053 is an apocalyptic number.

It is an amenable number.

25617512053 is a deficient number, since it is larger than the sum of its proper divisors (3659644587).

25617512053 is an equidigital number, since it uses as much as digits as its factorization.

25617512053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3659644586.

The product of its (nonzero) digits is 63000, while the sum is 37.

The spelling of 25617512053 in words is "twenty-five billion, six hundred seventeen million, five hundred twelve thousand, fifty-three".