25799988660 has 96 divisors (see below), whose sum is σ = 76075251840. Its totient is φ = 6515048448.

The previous prime is 25799988629. The next prime is 25799988673. The reversal of 25799988660 is 6688999752.

It is a super-2 number, since 2×25799988660² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4120252 + ... + 4126508.

It is an arithmetic number, because the mean of its divisors is an integer number (792450540).

Almost surely, 2^25799988660 is an apocalyptic number.

25799988660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25799988660 is an abundant number, since it is smaller than the sum of its proper divisors (50275263180).

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

25799988660 is a wasteful number, since it uses less digits than its factorization.

25799988660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9905 (or 9903 counting only the distinct ones).

The product of its (nonzero) digits is 117573120, while the sum is 69.

The spelling of 25799988660 in words is "twenty-five billion, seven hundred ninety-nine million, nine hundred eighty-eight thousand, six hundred sixty".