25631613479 has 2 divisors, whose sum is σ = 25631613480. Its totient is φ = 25631613478.

The previous prime is 25631613467. The next prime is 25631613481. The reversal of 25631613479 is 97431613652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25631613479 - 2²⁰ = 25630564903 is a prime.

Together with 25631613481, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25631613499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12815806739 + 12815806740.

It is an arithmetic number, because the mean of its divisors is an integer number (12815806740).

Almost surely, 2^25631613479 is an apocalyptic number.

25631613479 is a deficient number, since it is larger than the sum of its proper divisors (1).

25631613479 is an equidigital number, since it uses as much as digits as its factorization.

25631613479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 47.

The spelling of 25631613479 in words is "twenty-five billion, six hundred thirty-one million, six hundred thirteen thousand, four hundred seventy-nine".