16433321073691 has 2 divisors, whose sum is σ = 16433321073692. Its totient is φ = 16433321073690.

The previous prime is 16433321073671. The next prime is 16433321073727. The reversal of 16433321073691 is 19637012333461.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16433321073691 is a prime.

It is a super-2 number, since 2×16433321073691² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16433321073601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8216660536845 + 8216660536846.

It is an arithmetic number, because the mean of its divisors is an integer number (8216660536846).

Almost surely, 2^{16433321073691} is an apocalyptic number.

16433321073691 is a deficient number, since it is larger than the sum of its proper divisors (1).

16433321073691 is an equidigital number, since it uses as much as digits as its factorization.

16433321073691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1469664, while the sum is 49.

The spelling of 16433321073691 in words is "sixteen trillion, four hundred thirty-three billion, three hundred twenty-one million, seventy-three thousand, six hundred ninety-one".