26131997925 has 144 divisors (see below), whose sum is σ = 54473735680. Its totient is φ = 12260160000.

The previous prime is 26131997917. The next prime is 26131997951. The reversal of 26131997925 is 52979913162.

26131997925 is a `hidden beast` number, since 2 + 613 + 19 + 9 + 7 + 9 + 2 + 5 = 666.

It is not a de Polignac number, because 26131997925 - 2³ = 26131997917 is a prime.

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 143 ways as a sum of consecutive naturals, for example, 2526765 + ... + 2537085.

Almost surely, 2^26131997925 is an apocalyptic number.

26131997925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

26131997925 is an abundant number, since it is smaller than the sum of its proper divisors (28341737755).

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

26131997925 is a wasteful number, since it uses less digits than its factorization.

26131997925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10393 (or 10371 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 54.

The spelling of 26131997925 in words is "twenty-six billion, one hundred thirty-one million, nine hundred ninety-seven thousand, nine hundred twenty-five".