25516560 has 40 divisors (see below), whose sum is σ = 79102080. Its totient is φ = 6804352.

The previous prime is 25516553. The next prime is 25516571. The reversal of 25516560 is 6561552.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a nialpdrome in base 12.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52920 + ... + 53399.

It is an arithmetic number, because the mean of its divisors is an integer number (1977552).

Almost surely, 2^25516560 is an apocalyptic number.

25516560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25516560 is an abundant number, since it is smaller than the sum of its proper divisors (53585520).

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

25516560 is a wasteful number, since it uses less digits than its factorization.

25516560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106335 (or 106329 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 25516560 is about 5051.3918873910. The cubic root of 25516560 is about 294.4019676341.

The spelling of 25516560 in words is "twenty-five million, five hundred sixteen thousand, five hundred sixty".