25481558601 has 12 divisors (see below), whose sum is σ = 37801471812. Its totient is φ = 16528578336.

The previous prime is 25481558579. The next prime is 25481558611. The reversal of 25481558601 is 10685518452.

25481558601 is a `hidden beast` number, since 2 + 54 + 8 + 15 + 586 + 0 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20546355600 + 4935203001 = 143340^2 + 70251^2 .

It is not a de Polignac number, because 25481558601 - 2⁶ = 25481558537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25481558611) 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, 38260266 + ... + 38260931.

It is an arithmetic number, because the mean of its divisors is an integer number (3150122651).

Almost surely, 2^25481558601 is an apocalyptic number.

It is an amenable number.

25481558601 is a deficient number, since it is larger than the sum of its proper divisors (12319913211).

25481558601 is a wasteful number, since it uses less digits than its factorization.

25481558601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76521240 (or 76521237 counting only the distinct ones).

The product of its (nonzero) digits is 384000, while the sum is 45.

The spelling of 25481558601 in words is "twenty-five billion, four hundred eighty-one million, five hundred fifty-eight thousand, six hundred one".