27664701213 has 4 divisors (see below), whose sum is σ = 36886268288. Its totient is φ = 18443134140.

The previous prime is 27664701203. The next prime is 27664701223. The reversal of 27664701213 is 31210746672.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (27664701203) and next prime (27664701223).

It is not a de Polignac number, because 27664701213 - 2¹⁸ = 27664439069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27664701203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4610783533 + ... + 4610783538.

It is an arithmetic number, because the mean of its divisors is an integer number (9221567072).

Almost surely, 2^27664701213 is an apocalyptic number.

It is an amenable number.

27664701213 is a deficient number, since it is larger than the sum of its proper divisors (9221567075).

27664701213 is an equidigital number, since it uses as much as digits as its factorization.

27664701213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9221567074.

The product of its (nonzero) digits is 84672, while the sum is 39.

The spelling of 27664701213 in words is "twenty-seven billion, six hundred sixty-four million, seven hundred one thousand, two hundred thirteen".