16845668633 has 2 divisors, whose sum is σ = 16845668634. Its totient is φ = 16845668632.

The previous prime is 16845668621. The next prime is 16845668663. The reversal of 16845668633 is 33686654861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11347149529 + 5498519104 = 106523^2 + 74152^2 .

It is a cyclic number.

It is not a de Polignac number, because 16845668633 - 2³² = 12550701337 is a prime.

It is not a weakly prime, because it can be changed into another prime (16845668663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8422834316 + 8422834317.

It is an arithmetic number, because the mean of its divisors is an integer number (8422834317).

Almost surely, 2^16845668633 is an apocalyptic number.

It is an amenable number.

16845668633 is a deficient number, since it is larger than the sum of its proper divisors (1).

16845668633 is an equidigital number, since it uses as much as digits as its factorization.

16845668633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14929920, while the sum is 56.

The spelling of 16845668633 in words is "sixteen billion, eight hundred forty-five million, six hundred sixty-eight thousand, six hundred thirty-three".