25801560 has 48 divisors (see below), whose sum is σ = 83856240. Its totient is φ = 6880320.

The previous prime is 25801553. The next prime is 25801609. The reversal of 25801560 is 6510852.

25801560 is a `hidden beast` number, since 25 + 80 + 1 + 560 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35476 + ... + 36195.

It is an arithmetic number, because the mean of its divisors is an integer number (1747005).

Almost surely, 2^25801560 is an apocalyptic number.

25801560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25801560 is an abundant number, since it is smaller than the sum of its proper divisors (58054680).

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

25801560 is a wasteful number, since it uses less digits than its factorization.

25801560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71688 (or 71681 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 25801560 is about 5079.5235997089. The cubic root of 25801560 is about 295.4939918213.

The spelling of 25801560 in words is "twenty-five million, eight hundred one thousand, five hundred sixty".