25205664 has 48 divisors (see below), whose sum is σ = 72182880. Its totient is φ = 7637760.

The previous prime is 25205651. The next prime is 25205683. The reversal of 25205664 is 46650252.

It is a tau number, because it is divible by the number of its divisors (48).

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, 10879 + ... + 12990.

It is an arithmetic number, because the mean of its divisors is an integer number (1503810).

Almost surely, 2^25205664 is an apocalyptic number.

25205664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25205664 is an abundant number, since it is smaller than the sum of its proper divisors (46977216).

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

25205664 is a wasteful number, since it uses less digits than its factorization.

25205664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23893 (or 23885 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 25205664 is about 5020.5242754119. The cubic root of 25205664 is about 293.2014053201.

The spelling of 25205664 in words is "twenty-five million, two hundred five thousand, six hundred sixty-four".