25990594560 has 408 divisors, whose sum is σ = 103053263040. Its totient is φ = 5935988736.

The previous prime is 25990594543. The next prime is 25990594579. The reversal of 25990594560 is 6549509952.

25990594560 is a `hidden beast` number, since 2 + 59 + 90 + 59 + 456 + 0 = 666.

It is a super-2 number, since 2×25990594560² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25990594497 and 25990594506.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20643211 + ... + 20644469.

Almost surely, 2^25990594560 is an apocalyptic number.

25990594560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25990594560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51526631520).

25990594560 is an abundant number, since it is smaller than the sum of its proper divisors (77062668480).

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

25990594560 is an equidigital number, since it uses as much as digits as its factorization.

25990594560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1309 (or 1276 counting only the distinct ones).

The product of its (nonzero) digits is 4374000, while the sum is 54.

The spelling of 25990594560 in words is "twenty-five billion, nine hundred ninety million, five hundred ninety-four thousand, five hundred sixty".