2001718126619 has 2 divisors, whose sum is σ = 2001718126620. Its totient is φ = 2001718126618.

The previous prime is 2001718126553. The next prime is 2001718126637. The reversal of 2001718126619 is 9166218171002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001718126619 is a prime.

It is a super-2 number, since 2×2001718126619² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2001718126619.

It is not a weakly prime, because it can be changed into another prime (2001718126679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000859063309 + 1000859063310.

It is an arithmetic number, because the mean of its divisors is an integer number (1000859063310).

Almost surely, 2^{2001718126619} is an apocalyptic number.

2001718126619 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001718126619 is an equidigital number, since it uses as much as digits as its factorization.

2001718126619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 44.

The spelling of 2001718126619 in words is "two trillion, one billion, seven hundred eighteen million, one hundred twenty-six thousand, six hundred nineteen".