16994392691 has 2 divisors, whose sum is σ = 16994392692. Its totient is φ = 16994392690.

The previous prime is 16994392589. The next prime is 16994392711. The reversal of 16994392691 is 19629349961.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16994392691 - 2¹⁴ = 16994376307 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16994392691.

It is not a weakly prime, because it can be changed into another prime (16994392291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8497196345 + 8497196346.

It is an arithmetic number, because the mean of its divisors is an integer number (8497196346).

Almost surely, 2^16994392691 is an apocalyptic number.

16994392691 is a deficient number, since it is larger than the sum of its proper divisors (1).

16994392691 is an equidigital number, since it uses as much as digits as its factorization.

16994392691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5668704, while the sum is 59.

The spelling of 16994392691 in words is "sixteen billion, nine hundred ninety-four million, three hundred ninety-two thousand, six hundred ninety-one".