16456433663 has 4 divisors (see below), whose sum is σ = 16547353368. Its totient is φ = 16365513960.

The previous prime is 16456433639. The next prime is 16456433677. The reversal of 16456433663 is 36633465461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36633465461 = 17 ⋅2154909733.

It is a cyclic number.

It is not a de Polignac number, because 16456433663 - 2¹⁰ = 16456432639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16456433603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45459581 + ... + 45459942.

It is an arithmetic number, because the mean of its divisors is an integer number (4136838342).

Almost surely, 2^16456433663 is an apocalyptic number.

16456433663 is a deficient number, since it is larger than the sum of its proper divisors (90919705).

16456433663 is an equidigital number, since it uses as much as digits as its factorization.

16456433663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90919704.

The product of its digits is 2799360, while the sum is 47.

The spelling of 16456433663 in words is "sixteen billion, four hundred fifty-six million, four hundred thirty-three thousand, six hundred sixty-three".