25595899560 has 576 divisors, whose sum is σ = 108404150400. Its totient is φ = 5316917760.

The previous prime is 25595899559. The next prime is 25595899561. The reversal of 25595899560 is 6599859552.

It is an interprime number because it is at equal distance from previous prime (25595899559) and next prime (25595899561).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25595899561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 8231286 + ... + 8234394.

It is an arithmetic number, because the mean of its divisors is an integer number (188201650).

Almost surely, 2^25595899560 is an apocalyptic number.

25595899560 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 25595899560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54202075200).

25595899560 is an abundant number, since it is smaller than the sum of its proper divisors (82808250840).

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

25595899560 is a wasteful number, since it uses less digits than its factorization.

25595899560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3164 (or 3137 counting only the distinct ones).

The product of its (nonzero) digits is 43740000, while the sum is 63.

The spelling of 25595899560 in words is "twenty-five billion, five hundred ninety-five million, eight hundred ninety-nine thousand, five hundred sixty".