25668239131 has 4 divisors (see below), whose sum is σ = 26784249552. Its totient is φ = 24552228712.

The previous prime is 25668239117. The next prime is 25668239161. The reversal of 25668239131 is 13193286652.

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 25668239131 - 2¹⁵ = 25668206363 is a prime.

It is a super-2 number, since 2×25668239131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25668239161) 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, 558005176 + ... + 558005221.

It is an arithmetic number, because the mean of its divisors is an integer number (6696062388).

Almost surely, 2^25668239131 is an apocalyptic number.

25668239131 is a deficient number, since it is larger than the sum of its proper divisors (1116010421).

25668239131 is a wasteful number, since it uses less digits than its factorization.

25668239131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116010420.

The product of its digits is 466560, while the sum is 46.

The spelling of 25668239131 in words is "twenty-five billion, six hundred sixty-eight million, two hundred thirty-nine thousand, one hundred thirty-one".