27721992659 has 2 divisors, whose sum is σ = 27721992660. Its totient is φ = 27721992658.

The previous prime is 27721992653. The next prime is 27721992673. The reversal of 27721992659 is 95629912772.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27721992659 - 2⁴ = 27721992643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27721992598 and 27721992607.

It is not a weakly prime, because it can be changed into another prime (27721992653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13860996329 + 13860996330.

It is an arithmetic number, because the mean of its divisors is an integer number (13860996330).

Almost surely, 2^27721992659 is an apocalyptic number.

27721992659 is a deficient number, since it is larger than the sum of its proper divisors (1).

27721992659 is an equidigital number, since it uses as much as digits as its factorization.

27721992659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8573040, while the sum is 59.

The spelling of 27721992659 in words is "twenty-seven billion, seven hundred twenty-one million, nine hundred ninety-two thousand, six hundred fifty-nine".