25659061560 has 576 divisors, whose sum is σ = 95367767040. Its totient is φ = 5974848000.

The previous prime is 25659061517. The next prime is 25659061567. The reversal of 25659061560 is 6516095652.

25659061560 is a `hidden beast` number, since 2 + 5 + 6 + 590 + 6 + 1 + 56 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25659061567) 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, 169927485 + ... + 169927635.

It is an arithmetic number, because the mean of its divisors is an integer number (165569040).

Almost surely, 2^25659061560 is an apocalyptic number.

25659061560 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 25659061560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47683883520).

25659061560 is an abundant number, since it is smaller than the sum of its proper divisors (69708705480).

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

25659061560 is a wasteful number, since it uses less digits than its factorization.

25659061560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320 (or 302 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 45.

The spelling of 25659061560 in words is "twenty-five billion, six hundred fifty-nine million, sixty-one thousand, five hundred sixty".