25664402233 has 4 divisors (see below), whose sum is σ = 26492286208. Its totient is φ = 24836518260.

The previous prime is 25664402227. The next prime is 25664402249. The reversal of 25664402233 is 33220446652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25664402233 - 2⁵ = 25664402201 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25664402192 and 25664402201.

It is not an unprimeable number, because it can be changed into a prime (25664402213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 413941941 + ... + 413942002.

It is an arithmetic number, because the mean of its divisors is an integer number (6623071552).

Almost surely, 2^25664402233 is an apocalyptic number.

It is an amenable number.

25664402233 is a deficient number, since it is larger than the sum of its proper divisors (827883975).

25664402233 is an equidigital number, since it uses as much as digits as its factorization.

25664402233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827883974.

The product of its (nonzero) digits is 207360, while the sum is 37.

Adding to 25664402233 its reverse (33220446652), we get a palindrome (58884848885).

The spelling of 25664402233 in words is "twenty-five billion, six hundred sixty-four million, four hundred two thousand, two hundred thirty-three".