25999131508 has 48 divisors (see below), whose sum is σ = 52201231488. Its totient is φ = 11099088000.

The previous prime is 25999131493. The next prime is 25999131523. The reversal of 25999131508 is 80513199952.

It is an interprime number because it is at equal distance from previous prime (25999131493) and next prime (25999131523).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 9085998 + ... + 9088858.

It is an arithmetic number, because the mean of its divisors is an integer number (1087525656).

Almost surely, 2^25999131508 is an apocalyptic number.

25999131508 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

25999131508 is an abundant number, since it is smaller than the sum of its proper divisors (26202099980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25999131508 is a wasteful number, since it uses less digits than its factorization.

25999131508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4024 (or 4022 counting only the distinct ones).

The product of its (nonzero) digits is 874800, while the sum is 52.

The spelling of 25999131508 in words is "twenty-five billion, nine hundred ninety-nine million, one hundred thirty-one thousand, five hundred eight".