25644467 has 2 divisors, whose sum is σ = 25644468. Its totient is φ = 25644466.

The previous prime is 25644431. The next prime is 25644499. The reversal of 25644467 is 76444652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25644467 - 2¹⁸ = 25382323 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25644467.

It is not a weakly prime, because it can be changed into another prime (25644407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12822233 + 12822234.

It is an arithmetic number, because the mean of its divisors is an integer number (12822234).

Almost surely, 2^25644467 is an apocalyptic number.

25644467 is a deficient number, since it is larger than the sum of its proper divisors (1).

25644467 is an equidigital number, since it uses as much as digits as its factorization.

25644467 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 38.

The square root of 25644467 is about 5064.0366309892. The cubic root of 25644467 is about 294.8930647558.

The spelling of 25644467 in words is "twenty-five million, six hundred forty-four thousand, four hundred sixty-seven".