25500032539 has 4 divisors (see below), whose sum is σ = 25530793360. Its totient is φ = 25469271720.

The previous prime is 25500032513. The next prime is 25500032557. The reversal of 25500032539 is 93523000552.

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 25500032539 - 2⁵ = 25500032507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25500032599) 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, 15379167 + ... + 15380824.

It is an arithmetic number, because the mean of its divisors is an integer number (6382698340).

Almost surely, 2^25500032539 is an apocalyptic number.

25500032539 is a deficient number, since it is larger than the sum of its proper divisors (30760821).

25500032539 is an equidigital number, since it uses as much as digits as its factorization.

25500032539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30760820.

The product of its (nonzero) digits is 40500, while the sum is 34.

The spelling of 25500032539 in words is "twenty-five billion, five hundred million, thirty-two thousand, five hundred thirty-nine".