25604663233 has 8 divisors (see below), whose sum is σ = 25686465896. Its totient is φ = 25522992000.

The previous prime is 25604663191. The next prime is 25604663263. The reversal of 25604663233 is 33236640652.

It can be written as a sum of positive squares in 4 ways, for example, as 3150240129 + 22454423104 = 56127^2 + 149848^2 .

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-25604663233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25604663263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365035 + ... + 429487.

It is an arithmetic number, because the mean of its divisors is an integer number (3210808237).

Almost surely, 2^25604663233 is an apocalyptic number.

It is an amenable number.

25604663233 is a deficient number, since it is larger than the sum of its proper divisors (81802663).

25604663233 is an equidigital number, since it uses as much as digits as its factorization.

25604663233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65715.

The product of its (nonzero) digits is 466560, while the sum is 40.

The spelling of 25604663233 in words is "twenty-five billion, six hundred four million, six hundred sixty-three thousand, two hundred thirty-three".