25461553005601 has 4 divisors (see below), whose sum is σ = 25810341403012. Its totient is φ = 25112764608192.

The previous prime is 25461553005517. The next prime is 25461553005689. The reversal of 25461553005601 is 10650035516452.

It is a happy number.

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 16378200906001 + 9083352099600 = 4046999^2 + 3013860^2 .

It is a cyclic number.

It is not a de Polignac number, because 25461553005601 - 2⁴¹ = 23262529750049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25461553005001) 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, 174394198596 + ... + 174394198741.

It is an arithmetic number, because the mean of its divisors is an integer number (6452585350753).

Almost surely, 2^{25461553005601} is an apocalyptic number.

It is an amenable number.

25461553005601 is a deficient number, since it is larger than the sum of its proper divisors (348788397411).

25461553005601 is an equidigital number, since it uses as much as digits as its factorization.

25461553005601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348788397410.

The product of its (nonzero) digits is 540000, while the sum is 43.

The spelling of 25461553005601 in words is "twenty-five trillion, four hundred sixty-one billion, five hundred fifty-three million, five thousand, six hundred one".