25881245428181 has 32 divisors (see below), whose sum is σ = 30748948876800. Its totient is φ = 21473542126080.

The previous prime is 25881245428177. The next prime is 25881245428183. The reversal of 25881245428181 is 18182454218852.

It is not a de Polignac number, because 25881245428181 - 2² = 25881245428177 is a prime.

It is a super-2 number, since 2×25881245428181² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25881245428181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25881245428183) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 519605780 + ... + 519655586.

It is an arithmetic number, because the mean of its divisors is an integer number (960904652400).

Almost surely, 2^{25881245428181} is an apocalyptic number.

It is an amenable number.

25881245428181 is a deficient number, since it is larger than the sum of its proper divisors (4867703448619).

25881245428181 is a wasteful number, since it uses less digits than its factorization.

25881245428181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90749.

The product of its digits is 13107200, while the sum is 59.

The spelling of 25881245428181 in words is "twenty-five trillion, eight hundred eighty-one billion, two hundred forty-five million, four hundred twenty-eight thousand, one hundred eighty-one".