25540076605 has 8 divisors (see below), whose sum is σ = 30744775512. Its totient is φ = 20367605568.

The previous prime is 25540076593. The next prime is 25540076669. The reversal of 25540076605 is 50667004552.

It can be written as a sum of positive squares in 4 ways, for example, as 1421365401 + 24118711204 = 37701^2 + 155302^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25540076605 - 2²³ = 25531687997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8055222 + ... + 8058391.

It is an arithmetic number, because the mean of its divisors is an integer number (3843096939).

Almost surely, 2^25540076605 is an apocalyptic number.

It is an amenable number.

25540076605 is a deficient number, since it is larger than the sum of its proper divisors (5204698907).

25540076605 is a wasteful number, since it uses less digits than its factorization.

25540076605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16113935.

The product of its (nonzero) digits is 252000, while the sum is 40.

The spelling of 25540076605 in words is "twenty-five billion, five hundred forty million, seventy-six thousand, six hundred five".