27729977719 has 2 divisors, whose sum is σ = 27729977720. Its totient is φ = 27729977718.

The previous prime is 27729977701. The next prime is 27729977767. The reversal of 27729977719 is 91777992772.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27729977719 - 2⁷ = 27729977591 is a prime.

It is a super-2 number, since 2×27729977719² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27729977819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13864988859 + 13864988860.

It is an arithmetic number, because the mean of its divisors is an integer number (13864988860).

Almost surely, 2^27729977719 is an apocalyptic number.

27729977719 is a deficient number, since it is larger than the sum of its proper divisors (1).

27729977719 is an equidigital number, since it uses as much as digits as its factorization.

27729977719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49009212, while the sum is 67.

The spelling of 27729977719 in words is "twenty-seven billion, seven hundred twenty-nine million, nine hundred seventy-seven thousand, seven hundred nineteen".