25605224961 has 12 divisors (see below), whose sum is σ = 36031730832. Its totient is φ = 16171720344.

The previous prime is 25605224933. The next prime is 25605224963. The reversal of 25605224961 is 16942250652.

It is not a de Polignac number, because 25605224961 - 2⁵ = 25605224929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25605224963) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11820351 + ... + 11822516.

It is an arithmetic number, because the mean of its divisors is an integer number (3002644236).

Almost surely, 2^25605224961 is an apocalyptic number.

It is an amenable number.

25605224961 is a deficient number, since it is larger than the sum of its proper divisors (10426505871).

25605224961 is a wasteful number, since it uses less digits than its factorization.

25605224961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23642908 (or 23642889 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 25605224961 in words is "twenty-five billion, six hundred five million, two hundred twenty-four thousand, nine hundred sixty-one".