27649212931 has 4 divisors (see below), whose sum is σ = 27678976200. Its totient is φ = 27619449664.

The previous prime is 27649212919. The next prime is 27649212949. The reversal of 27649212931 is 13921294672.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27649212931 - 2¹⁹ = 27648688643 is a prime.

It is a super-2 number, since 2×27649212931² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27649212911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14880241 + ... + 14882098.

It is an arithmetic number, because the mean of its divisors is an integer number (6919744050).

Almost surely, 2^27649212931 is an apocalyptic number.

27649212931 is a deficient number, since it is larger than the sum of its proper divisors (29763269).

27649212931 is an equidigital number, since it uses as much as digits as its factorization.

27649212931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29763268.

The product of its digits is 326592, while the sum is 46.

The spelling of 27649212931 in words is "twenty-seven billion, six hundred forty-nine million, two hundred twelve thousand, nine hundred thirty-one".