25664260199 has 16 divisors (see below), whose sum is σ = 26203530240. Its totient is φ = 25128732000.

The previous prime is 25664260189. The next prime is 25664260201. The reversal of 25664260199 is 99106246652.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 25664260199 - 2¹⁶ = 25664194663 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 (25664260169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28933334 + ... + 28934220.

It is an arithmetic number, because the mean of its divisors is an integer number (1637720640).

Almost surely, 2^25664260199 is an apocalyptic number.

25664260199 is a deficient number, since it is larger than the sum of its proper divisors (539270041).

25664260199 is an equidigital number, since it uses as much as digits as its factorization.

25664260199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2350.

The product of its (nonzero) digits is 1399680, while the sum is 50.

The spelling of 25664260199 in words is "twenty-five billion, six hundred sixty-four million, two hundred sixty thousand, one hundred ninety-nine".