27777660613 has 4 divisors (see below), whose sum is σ = 28248468480. Its totient is φ = 27306852748.

The previous prime is 27777660611. The next prime is 27777660619. The reversal of 27777660613 is 31606677772.

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 a cyclic number.

It is not a de Polignac number, because 27777660613 - 2¹ = 27777660611 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 (27777660611) 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, 235403845 + ... + 235403962.

It is an arithmetic number, because the mean of its divisors is an integer number (7062117120).

Almost surely, 2^27777660613 is an apocalyptic number.

It is an amenable number.

27777660613 is a deficient number, since it is larger than the sum of its proper divisors (470807867).

27777660613 is an equidigital number, since it uses as much as digits as its factorization.

27777660613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470807866.

The product of its (nonzero) digits is 3111696, while the sum is 52.

The spelling of 27777660613 in words is "twenty-seven billion, seven hundred seventy-seven million, six hundred sixty thousand, six hundred thirteen".