25525500971 has 4 divisors (see below), whose sum is σ = 25617651072. Its totient is φ = 25433350872.

The previous prime is 25525500941. The next prime is 25525500977. The reversal of 25525500971 is 17900552552.

It is a happy number.

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 25525500971 - 2⁶ = 25525500907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25525500977) 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, 46074635 + ... + 46075188.

It is an arithmetic number, because the mean of its divisors is an integer number (6404412768).

Almost surely, 2^25525500971 is an apocalyptic number.

25525500971 is a deficient number, since it is larger than the sum of its proper divisors (92150101).

25525500971 is an equidigital number, since it uses as much as digits as its factorization.

25525500971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92150100.

The product of its (nonzero) digits is 157500, while the sum is 41.

The spelling of 25525500971 in words is "twenty-five billion, five hundred twenty-five million, five hundred thousand, nine hundred seventy-one".