25325511521 has 8 divisors (see below), whose sum is σ = 26664160320. Its totient is φ = 23987435472.

The previous prime is 25325511511. The next prime is 25325511557. The reversal of 25325511521 is 12511552352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25325511521 - 2²⁶ = 25258402657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25325511511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50885 + ... + 230738.

It is an arithmetic number, because the mean of its divisors is an integer number (3333020040).

Almost surely, 2^25325511521 is an apocalyptic number.

It is an amenable number.

25325511521 is a deficient number, since it is larger than the sum of its proper divisors (1338648799).

25325511521 is a wasteful number, since it uses less digits than its factorization.

25325511521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286375.

The product of its digits is 15000, while the sum is 32.

The spelling of 25325511521 in words is "twenty-five billion, three hundred twenty-five million, five hundred eleven thousand, five hundred twenty-one".