19115968667 has 2 divisors, whose sum is σ = 19115968668. Its totient is φ = 19115968666.

The previous prime is 19115968661. The next prime is 19115968769. The reversal of 19115968667 is 76686951191.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19115968667 - 2²⁴ = 19099191451 is a prime.

It is not a weakly prime, because it can be changed into another prime (19115968661) 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, 9557984333 + 9557984334.

It is an arithmetic number, because the mean of its divisors is an integer number (9557984334).

Almost surely, 2^19115968667 is an apocalyptic number.

19115968667 is a deficient number, since it is larger than the sum of its proper divisors (1).

19115968667 is an equidigital number, since it uses as much as digits as its factorization.

19115968667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4898880, while the sum is 59.

The spelling of 19115968667 in words is "nineteen billion, one hundred fifteen million, nine hundred sixty-eight thousand, six hundred sixty-seven".