27477531513 has 6 divisors (see below), whose sum is σ = 39689767754. Its totient is φ = 18318354336.

The previous prime is 27477531469. The next prime is 27477531517. The reversal of 27477531513 is 31513577472.

27477531513 is a `hidden beast` number, since 27 + 47 + 7 + 531 + 51 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19480343184 + 7997188329 = 139572^2 + 89427^2 .

It is not a de Polignac number, because 27477531513 - 2⁶ = 27477531449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27477531517) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1526529520 + ... + 1526529537.

Almost surely, 2^27477531513 is an apocalyptic number.

It is an amenable number.

27477531513 is a deficient number, since it is larger than the sum of its proper divisors (12212236241).

27477531513 is a wasteful number, since it uses less digits than its factorization.

27477531513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3053059063 (or 3053059060 counting only the distinct ones).

The product of its digits is 617400, while the sum is 45.

The spelling of 27477531513 in words is "twenty-seven billion, four hundred seventy-seven million, five hundred thirty-one thousand, five hundred thirteen".