25251982007 has 4 divisors (see below), whose sum is σ = 28859408016. Its totient is φ = 21644556000.

The previous prime is 25251981973. The next prime is 25251982031. The reversal of 25251982007 is 70028915252.

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 25251982007 - 2²⁰ = 25250933431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25251982057) 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, 1803712994 + ... + 1803713007.

It is an arithmetic number, because the mean of its divisors is an integer number (7214852004).

Almost surely, 2^25251982007 is an apocalyptic number.

25251982007 is a deficient number, since it is larger than the sum of its proper divisors (3607426009).

25251982007 is an equidigital number, since it uses as much as digits as its factorization.

25251982007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3607426008.

The product of its (nonzero) digits is 100800, while the sum is 41.

The spelling of 25251982007 in words is "twenty-five billion, two hundred fifty-one million, nine hundred eighty-two thousand, seven".