27691930305 has 24 divisors (see below), whose sum is σ = 51691604328. Its totient is φ = 13632950016.

The previous prime is 27691930289. The next prime is 27691930337. The reversal of 27691930305 is 50303919672.

It can be written as a sum of positive squares in 4 ways, for example, as 606341376 + 27085588929 = 24624^2 + 164577^2 .

It is not a de Polignac number, because 27691930305 - 2⁴ = 27691930289 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23667732 + ... + 23668901.

It is an arithmetic number, because the mean of its divisors is an integer number (2153816847).

Almost surely, 2^27691930305 is an apocalyptic number.

It is an amenable number.

27691930305 is a deficient number, since it is larger than the sum of its proper divisors (23999674023).

27691930305 is a wasteful number, since it uses less digits than its factorization.

27691930305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47336657 (or 47336654 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 45.

The spelling of 27691930305 in words is "twenty-seven billion, six hundred ninety-one million, nine hundred thirty thousand, three hundred five".