25431671660605 has 32 divisors (see below), whose sum is σ = 35117560710144. Its totient is φ = 17319245561856.

The previous prime is 25431671660599. The next prime is 25431671660627. The reversal of 25431671660605 is 50606617613452.

It is not a de Polignac number, because 25431671660605 - 2⁴³ = 16635578638397 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 31 ways as a sum of consecutive naturals, for example, 831292 + ... + 7180138.

It is an arithmetic number, because the mean of its divisors is an integer number (1097423772192).

Almost surely, 2^{25431671660605} is an apocalyptic number.

It is an amenable number.

25431671660605 is a deficient number, since it is larger than the sum of its proper divisors (9685889049539).

25431671660605 is a wasteful number, since it uses less digits than its factorization.

25431671660605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6349645.

The product of its (nonzero) digits is 5443200, while the sum is 52.

The spelling of 25431671660605 in words is "twenty-five trillion, four hundred thirty-one billion, six hundred seventy-one million, six hundred sixty thousand, six hundred five".