25604506265161 has 8 divisors (see below), whose sum is σ = 25747288583744. Its totient is φ = 25461738462960.

The previous prime is 25604506265131. The next prime is 25604506265267. The reversal of 25604506265161 is 16156260540652.

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-25604506265161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25604506265131) 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, 81951 + ... + 7156516.

It is an arithmetic number, because the mean of its divisors is an integer number (3218411072968).

Almost surely, 2^{25604506265161} is an apocalyptic number.

It is an amenable number.

25604506265161 is a deficient number, since it is larger than the sum of its proper divisors (142782318583).

25604506265161 is a wasteful number, since it uses less digits than its factorization.

25604506265161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7258191.

The product of its (nonzero) digits is 2592000, while the sum is 49.

The spelling of 25604506265161 in words is "twenty-five trillion, six hundred four billion, five hundred six million, two hundred sixty-five thousand, one hundred sixty-one".