25518560 has 24 divisors (see below), whose sum is σ = 60287976. Its totient is φ = 10207360.

The previous prime is 25518553. The next prime is 25518583. The reversal of 25518560 is 6581552.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79586 + ... + 79905.

It is an arithmetic number, because the mean of its divisors is an integer number (2511999).

Almost surely, 2^25518560 is an apocalyptic number.

25518560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25518560 is an abundant number, since it is smaller than the sum of its proper divisors (34769416).

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

25518560 is a wasteful number, since it uses less digits than its factorization.

25518560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159506 (or 159498 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 25518560 is about 5051.5898487506. The cubic root of 25518560 is about 294.4096592215.

It can be divided in two parts, 2551 and 8560, that added together give a palindrome (11111).

The spelling of 25518560 in words is "twenty-five million, five hundred eighteen thousand, five hundred sixty".