25988139086409 has 10 divisors (see below), whose sum is σ = 38821788018090. Its totient is φ = 17325426057552.

The previous prime is 25988139086401. The next prime is 25988139086423. The reversal of 25988139086409 is 90468093188952.

25988139086409 is a `hidden beast` number, since 2 + 5 + 9 + 8 + 8 + 139 + 0 + 86 + 409 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17064566141184 + 8923572945225 = 4130928^2 + 2987235^2 .

It is not a de Polignac number, because 25988139086409 - 2³ = 25988139086401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25988139086401) 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 9 ways as a sum of consecutive naturals, for example, 160420611564 + ... + 160420611725.

It is an arithmetic number, because the mean of its divisors is an integer number (3882178801809).

Almost surely, 2^{25988139086409} is an apocalyptic number.

It is an amenable number.

25988139086409 is a deficient number, since it is larger than the sum of its proper divisors (12833648931681).

25988139086409 is an equidigital number, since it uses as much as digits as its factorization.

25988139086409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320841223301 (or 320841223292 counting only the distinct ones).

The product of its (nonzero) digits is 268738560, while the sum is 72.

The spelling of 25988139086409 in words is "twenty-five trillion, nine hundred eighty-eight billion, one hundred thirty-nine million, eighty-six thousand, four hundred nine".