25204564403 has 4 divisors (see below), whose sum is σ = 25207828128. Its totient is φ = 25201300680.

The previous prime is 25204564387. The next prime is 25204564409. The reversal of 25204564403 is 30446540252.

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 25204564403 - 2⁴ = 25204564387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25204564409) 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, 1620251 + ... + 1635732.

It is an arithmetic number, because the mean of its divisors is an integer number (6301957032).

Almost surely, 2^25204564403 is an apocalyptic number.

25204564403 is a deficient number, since it is larger than the sum of its proper divisors (3263725).

25204564403 is an equidigital number, since it uses as much as digits as its factorization.

25204564403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3263724.

The product of its (nonzero) digits is 115200, while the sum is 35.

The spelling of 25204564403 in words is "twenty-five billion, two hundred four million, five hundred sixty-four thousand, four hundred three".