25410785042161 has 4 divisors (see below), whose sum is σ = 25551176119924. Its totient is φ = 25270393964400.

The previous prime is 25410785042119. The next prime is 25410785042189. The reversal of 25410785042161 is 16124058701452.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11302640563600 + 14108144478561 = 3361940^2 + 3756081^2 .

It is a cyclic number.

It is not a de Polignac number, because 25410785042161 - 2³⁵ = 25376425303793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25410785049161) 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, 70195538610 + ... + 70195538971.

It is an arithmetic number, because the mean of its divisors is an integer number (6387794029981).

Almost surely, 2^{25410785042161} is an apocalyptic number.

It is an amenable number.

25410785042161 is a deficient number, since it is larger than the sum of its proper divisors (140391077763).

25410785042161 is a wasteful number, since it uses less digits than its factorization.

25410785042161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140391077762.

The product of its (nonzero) digits is 537600, while the sum is 46.

The spelling of 25410785042161 in words is "twenty-five trillion, four hundred ten billion, seven hundred eighty-five million, forty-two thousand, one hundred sixty-one".