25207508957 has 4 divisors (see below), whose sum is σ = 25211961180. Its totient is φ = 25203056736.

The previous prime is 25207508951. The next prime is 25207508971. The reversal of 25207508957 is 75980570252.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11444934361 + 13762574596 = 106981^2 + 117314^2 .

It is a cyclic number.

It is not a de Polignac number, because 25207508957 - 2¹⁴ = 25207492573 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 (25207508951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2217608 + ... + 2228945.

It is an arithmetic number, because the mean of its divisors is an integer number (6302990295).

Almost surely, 2^25207508957 is an apocalyptic number.

It is an amenable number.

25207508957 is a deficient number, since it is larger than the sum of its proper divisors (4452223).

25207508957 is an equidigital number, since it uses as much as digits as its factorization.

25207508957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4452222.

The product of its (nonzero) digits is 1764000, while the sum is 50.

The spelling of 25207508957 in words is "twenty-five billion, two hundred seven million, five hundred eight thousand, nine hundred fifty-seven".