25861252631 has 8 divisors (see below), whose sum is σ = 26227514880. Its totient is φ = 25496292472.

The previous prime is 25861252609. The next prime is 25861252633. The reversal of 25861252631 is 13625216852.

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

It is not a de Polignac number, because 25861252631 - 2¹⁰ = 25861251607 is a prime.

It is a super-2 number, since 2×25861252631² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25861252633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285485 + ... + 364998.

It is an arithmetic number, because the mean of its divisors is an integer number (3278439360).

Almost surely, 2^25861252631 is an apocalyptic number.

25861252631 is a deficient number, since it is larger than the sum of its proper divisors (366262249).

25861252631 is an equidigital number, since it uses as much as digits as its factorization.

25861252631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651045.

The product of its digits is 172800, while the sum is 41.

The spelling of 25861252631 in words is "twenty-five billion, eight hundred sixty-one million, two hundred fifty-two thousand, six hundred thirty-one".