25664101 has 8 divisors (see below), whose sum is σ = 28111320. Its totient is φ = 23321088.

The previous prime is 25664087. The next prime is 25664123. The reversal of 25664101 is 10146652.

It can be written as a sum of positive squares in 4 ways, for example, as 9672100 + 15992001 = 3110^2 + 3999^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25664101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25664701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25536 + ... + 26521.

It is an arithmetic number, because the mean of its divisors is an integer number (3513915).

Almost surely, 2^25664101 is an apocalyptic number.

It is an amenable number.

25664101 is a deficient number, since it is larger than the sum of its proper divisors (2447219).

25664101 is a wasteful number, since it uses less digits than its factorization.

25664101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52103.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 25664101 is about 5065.9748321522. The cubic root of 25664101 is about 294.9683045522.

The spelling of 25664101 in words is "twenty-five million, six hundred sixty-four thousand, one hundred one".