16568469133 has 2 divisors, whose sum is σ = 16568469134. Its totient is φ = 16568469132.

The previous prime is 16568469121. The next prime is 16568469143. The reversal of 16568469133 is 33196486561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10911473764 + 5656995369 = 104458^2 + 75213^2 .

It is a cyclic number.

It is not a de Polignac number, because 16568469133 - 2⁵ = 16568469101 is a prime.

It is a super-2 number, since 2×16568469133² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16568469143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8284234566 + 8284234567.

It is an arithmetic number, because the mean of its divisors is an integer number (8284234567).

Almost surely, 2^16568469133 is an apocalyptic number.

It is an amenable number.

16568469133 is a deficient number, since it is larger than the sum of its proper divisors (1).

16568469133 is an equidigital number, since it uses as much as digits as its factorization.

16568469133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2799360, while the sum is 52.

The spelling of 16568469133 in words is "sixteen billion, five hundred sixty-eight million, four hundred sixty-nine thousand, one hundred thirty-three".