25426551853 has 4 divisors (see below), whose sum is σ = 25612147260. Its totient is φ = 25240956448.

The previous prime is 25426551809. The next prime is 25426551863. The reversal of 25426551853 is 35815562452.

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 19204970724 + 6221581129 = 138582^2 + 78877^2 .

It is a cyclic number.

It is not a de Polignac number, because 25426551853 - 2²¹ = 25424454701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25426551803) 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, 92797498 + ... + 92797771.

It is an arithmetic number, because the mean of its divisors is an integer number (6403036815).

Almost surely, 2^25426551853 is an apocalyptic number.

It is an amenable number.

25426551853 is a deficient number, since it is larger than the sum of its proper divisors (185595407).

25426551853 is a wasteful number, since it uses less digits than its factorization.

25426551853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185595406.

The product of its digits is 1440000, while the sum is 46.

The spelling of 25426551853 in words is "twenty-five billion, four hundred twenty-six million, five hundred fifty-one thousand, eight hundred fifty-three".