25641764 has 6 divisors (see below), whose sum is σ = 44873094. Its totient is φ = 12820880.

The previous prime is 25641751. The next prime is 25641793. The reversal of 25641764 is 46714652.

It can be written as a sum of positive squares in only one way, i.e., 22372900 + 3268864 = 4730^2 + 1808^2 .

It is a super-2 number, since 2×25641764² = 1315000122063392, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3205217 + ... + 3205224.

It is an arithmetic number, because the mean of its divisors is an integer number (7478849).

Almost surely, 2^25641764 is an apocalyptic number.

It is an amenable number.

25641764 is a deficient number, since it is larger than the sum of its proper divisors (19231330).

25641764 is a wasteful number, since it uses less digits than its factorization.

25641764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6410445 (or 6410443 counting only the distinct ones).

The product of its digits is 40320, while the sum is 35.

The square root of 25641764 is about 5063.7697420005. The cubic root of 25641764 is about 294.8827035349.

The spelling of 25641764 in words is "twenty-five million, six hundred forty-one thousand, seven hundred sixty-four".