27431305845 has 16 divisors (see below), whose sum is σ = 44048544000. Its totient is φ = 14577211584.

The previous prime is 27431305843. The next prime is 27431305873. The reversal of 27431305845 is 54850313472.

It is not a de Polignac number, because 27431305845 - 2¹ = 27431305843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27431305797 and 27431305806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27431305843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3296845 + ... + 3305154.

It is an arithmetic number, because the mean of its divisors is an integer number (2753034000).

Almost surely, 2^27431305845 is an apocalyptic number.

It is an amenable number.

27431305845 is a deficient number, since it is larger than the sum of its proper divisors (16617238155).

27431305845 is a wasteful number, since it uses less digits than its factorization.

27431305845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6602284.

The product of its (nonzero) digits is 403200, while the sum is 42.

The spelling of 27431305845 in words is "twenty-seven billion, four hundred thirty-one million, three hundred five thousand, eight hundred forty-five".