168350001691 has 2 divisors, whose sum is σ = 168350001692. Its totient is φ = 168350001690.

The previous prime is 168350001679. The next prime is 168350001697. The reversal of 168350001691 is 196100053861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 168350001691 - 2²¹ = 168347904539 is a prime.

It is not a weakly prime, because it can be changed into another prime (168350001697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84175000845 + 84175000846.

It is an arithmetic number, because the mean of its divisors is an integer number (84175000846).

Almost surely, 2^168350001691 is an apocalyptic number.

168350001691 is a deficient number, since it is larger than the sum of its proper divisors (1).

168350001691 is an equidigital number, since it uses as much as digits as its factorization.

168350001691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 40.

The spelling of 168350001691 in words is "one hundred sixty-eight billion, three hundred fifty million, one thousand, six hundred ninety-one".