25252637639 has 8 divisors (see below), whose sum is σ = 25922602560. Its totient is φ = 24591430656.

The previous prime is 25252637621. The next prime is 25252637651. The reversal of 25252637639 is 93673625252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25252637639 - 2²⁴ = 25235860423 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 (25252637699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2183642 + ... + 2195175.

It is an arithmetic number, because the mean of its divisors is an integer number (3240325320).

Almost surely, 2^25252637639 is an apocalyptic number.

25252637639 is a deficient number, since it is larger than the sum of its proper divisors (669964921).

25252637639 is an equidigital number, since it uses as much as digits as its factorization.

25252637639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4378969.

The product of its digits is 4082400, while the sum is 50.

The spelling of 25252637639 in words is "twenty-five billion, two hundred fifty-two million, six hundred thirty-seven thousand, six hundred thirty-nine".