25428907831 has 2 divisors, whose sum is σ = 25428907832. Its totient is φ = 25428907830.

The previous prime is 25428907793. The next prime is 25428907843. The reversal of 25428907831 is 13870982452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25428907831 - 2⁷ = 25428907703 is a prime.

It is a super-2 number, since 2×25428907831² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25428907331) 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 as a sum of consecutive naturals, namely, 12714453915 + 12714453916.

It is an arithmetic number, because the mean of its divisors is an integer number (12714453916).

Almost surely, 2^25428907831 is an apocalyptic number.

25428907831 is a deficient number, since it is larger than the sum of its proper divisors (1).

25428907831 is an equidigital number, since it uses as much as digits as its factorization.

25428907831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 25428907831 in words is "twenty-five billion, four hundred twenty-eight million, nine hundred seven thousand, eight hundred thirty-one".