25664182408243 has 4 divisors (see below), whose sum is σ = 25671533939208. Its totient is φ = 25656830877280.

The previous prime is 25664182408237. The next prime is 25664182408309. The reversal of 25664182408243 is 34280428146652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25664182408243 - 2¹⁷ = 25664182277171 is a prime.

It is a super-2 number, since 2×25664182408243² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25661182408243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3675760246 + ... + 3675767227.

It is an arithmetic number, because the mean of its divisors is an integer number (6417883484802).

Almost surely, 2^{25664182408243} is an apocalyptic number.

25664182408243 is a deficient number, since it is larger than the sum of its proper divisors (7351530965).

25664182408243 is an equidigital number, since it uses as much as digits as its factorization.

25664182408243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7351530964.

The product of its (nonzero) digits is 17694720, while the sum is 55.

The spelling of 25664182408243 in words is "twenty-five trillion, six hundred sixty-four billion, one hundred eighty-two million, four hundred eight thousand, two hundred forty-three".