27779865313 has 4 divisors (see below), whose sum is σ = 28987685568. Its totient is φ = 26572045060.

The previous prime is 27779865307. The next prime is 27779865317. The reversal of 27779865313 is 31356897772.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-27779865313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27779865317) 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, 603910093 + ... + 603910138.

It is an arithmetic number, because the mean of its divisors is an integer number (7246921392).

Almost surely, 2^27779865313 is an apocalyptic number.

27779865313 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

27779865313 is a deficient number, since it is larger than the sum of its proper divisors (1207820255).

27779865313 is a wasteful number, since it uses less digits than its factorization.

27779865313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1207820254.

The product of its digits is 13335840, while the sum is 58.

The spelling of 27779865313 in words is "twenty-seven billion, seven hundred seventy-nine million, eight hundred sixty-five thousand, three hundred thirteen".