25409332493279 has 4 divisors (see below), whose sum is σ = 29039237135184. Its totient is φ = 21779427851376.

The previous prime is 25409332493263. The next prime is 25409332493323. The reversal of 25409332493279 is 97239423390452.

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 25409332493279 - 2⁴ = 25409332493263 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 (25409332499279) 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, 1814952320942 + ... + 1814952320955.

It is an arithmetic number, because the mean of its divisors is an integer number (7259809283796).

Almost surely, 2^{25409332493279} is an apocalyptic number.

25409332493279 is a deficient number, since it is larger than the sum of its proper divisors (3629904641905).

25409332493279 is an equidigital number, since it uses as much as digits as its factorization.

25409332493279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3629904641904.

The product of its (nonzero) digits is 88179840, while the sum is 62.

The spelling of 25409332493279 in words is "twenty-five trillion, four hundred nine billion, three hundred thirty-two million, four hundred ninety-three thousand, two hundred seventy-nine".