16501313291 has 2 divisors, whose sum is σ = 16501313292. Its totient is φ = 16501313290.

The previous prime is 16501313261. The next prime is 16501313329. The reversal of 16501313291 is 19231310561.

It is a weak prime.

It is an emirp because it is prime and its reverse (19231310561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16501313291 - 2²⁶ = 16434204427 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (16501313221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8250656645 + 8250656646.

It is an arithmetic number, because the mean of its divisors is an integer number (8250656646).

Almost surely, 2^16501313291 is an apocalyptic number.

16501313291 is a deficient number, since it is larger than the sum of its proper divisors (1).

16501313291 is an equidigital number, since it uses as much as digits as its factorization.

16501313291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 32.

The spelling of 16501313291 in words is "sixteen billion, five hundred one million, three hundred thirteen thousand, two hundred ninety-one".