25325511515 has 4 divisors (see below), whose sum is σ = 30390613824. Its totient is φ = 20260409208.

The previous prime is 25325511511. The next prime is 25325511557. The reversal of 25325511515 is 51511552352.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25325511515 - 2² = 25325511511 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 2532551147 + ... + 2532551156.

It is an arithmetic number, because the mean of its divisors is an integer number (7597653456).

Almost surely, 2^25325511515 is an apocalyptic number.

25325511515 is a deficient number, since it is larger than the sum of its proper divisors (5065102309).

25325511515 is an equidigital number, since it uses as much as digits as its factorization.

25325511515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5065102308.

The product of its digits is 37500, while the sum is 35.

The spelling of 25325511515 in words is "twenty-five billion, three hundred twenty-five million, five hundred eleven thousand, five hundred fifteen".