25642782131 has 2 divisors, whose sum is σ = 25642782132. Its totient is φ = 25642782130.

The previous prime is 25642782119. The next prime is 25642782149. The reversal of 25642782131 is 13128724652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25642782131 - 2¹⁰ = 25642781107 is a prime.

It is a super-2 number, since 2×25642782131² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25642782331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12821391065 + 12821391066.

It is an arithmetic number, because the mean of its divisors is an integer number (12821391066).

Almost surely, 2^25642782131 is an apocalyptic number.

25642782131 is a deficient number, since it is larger than the sum of its proper divisors (1).

25642782131 is an equidigital number, since it uses as much as digits as its factorization.

25642782131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 41.

The spelling of 25642782131 in words is "twenty-five billion, six hundred forty-two million, seven hundred eighty-two thousand, one hundred thirty-one".