25405135256053 has 4 divisors (see below), whose sum is σ = 29034440292640. Its totient is φ = 21775830219468.

The previous prime is 25405135255979. The next prime is 25405135256063. The reversal of 25405135256053 is 35065253150452.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25405135256053 - 2²⁹ = 25404598385141 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25405135255994 and 25405135256012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25405135256063) 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, 1814652518283 + ... + 1814652518296.

It is an arithmetic number, because the mean of its divisors is an integer number (7258610073160).

Almost surely, 2^{25405135256053} is an apocalyptic number.

It is an amenable number.

25405135256053 is a deficient number, since it is larger than the sum of its proper divisors (3629305036587).

25405135256053 is an equidigital number, since it uses as much as digits as its factorization.

25405135256053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3629305036586.

The product of its (nonzero) digits is 2700000, while the sum is 46.

The spelling of 25405135256053 in words is "twenty-five trillion, four hundred five billion, one hundred thirty-five million, two hundred fifty-six thousand, fifty-three".