16445831817 has 8 divisors (see below), whose sum is σ = 22520418496. Its totient is φ = 10667566512.

The previous prime is 16445831783. The next prime is 16445831833. The reversal of 16445831817 is 71813854461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16445831817 - 2⁸ = 16445831561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16445831837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74080213 + ... + 74080434.

It is an arithmetic number, because the mean of its divisors is an integer number (2815052312).

Almost surely, 2^16445831817 is an apocalyptic number.

It is an amenable number.

16445831817 is a deficient number, since it is larger than the sum of its proper divisors (6074586679).

16445831817 is a wasteful number, since it uses less digits than its factorization.

16445831817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148160687.

The product of its digits is 645120, while the sum is 48.

The spelling of 16445831817 in words is "sixteen billion, four hundred forty-five million, eight hundred thirty-one thousand, eight hundred seventeen".