25655743560 has 128 divisors (see below), whose sum is σ = 78323736960. Its totient is φ = 6721228800.

The previous prime is 25655743517. The next prime is 25655743573. The reversal of 25655743560 is 6534755652.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 8218800 + ... + 8221920.

It is an arithmetic number, because the mean of its divisors is an integer number (611904195).

Almost surely, 2^25655743560 is an apocalyptic number.

25655743560 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 25655743560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39161868480).

25655743560 is an abundant number, since it is smaller than the sum of its proper divisors (52667993400).

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

25655743560 is a wasteful number, since it uses less digits than its factorization.

25655743560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4319 (or 4315 counting only the distinct ones).

The product of its (nonzero) digits is 3780000, while the sum is 48.

The spelling of 25655743560 in words is "twenty-five billion, six hundred fifty-five million, seven hundred forty-three thousand, five hundred sixty".