25261766656 has 96 divisors (see below), whose sum is σ = 57842104320. Its totient is φ = 10804912128.

The previous prime is 25261766653. The next prime is 25261766681. The reversal of 25261766656 is 65666716252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25261766653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8700501 + ... + 8703403.

It is an arithmetic number, because the mean of its divisors is an integer number (602521920).

Almost surely, 2^25261766656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25261766656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28921052160).

25261766656 is an abundant number, since it is smaller than the sum of its proper divisors (32580337664).

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

25261766656 is an equidigital number, since it uses as much as digits as its factorization.

25261766656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3539 (or 3519 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 52.

The spelling of 25261766656 in words is "twenty-five billion, two hundred sixty-one million, seven hundred sixty-six thousand, six hundred fifty-six".