25890131864 has 24 divisors (see below), whose sum is σ = 50160461580. Its totient is φ = 12527479440.

The previous prime is 25890131863. The next prime is 25890131879. The reversal of 25890131864 is 46813109852.

It is a happy number.

It is a super-2 number, since 2×25890131864² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25890131863) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1676114 + ... + 1691489.

Almost surely, 2^25890131864 is an apocalyptic number.

It is an amenable number.

25890131864 is a deficient number, since it is larger than the sum of its proper divisors (24270329716).

25890131864 is a wasteful number, since it uses less digits than its factorization.

25890131864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3367671 (or 3367636 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 47.

The spelling of 25890131864 in words is "twenty-five billion, eight hundred ninety million, one hundred thirty-one thousand, eight hundred sixty-four".