16217664465 has 8 divisors (see below), whose sum is σ = 25948263168. Its totient is φ = 8649421040.

The previous prime is 16217664427. The next prime is 16217664473. The reversal of 16217664465 is 56446671261.

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

It is not a de Polignac number, because 16217664465 - 2⁹ = 16217663953 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 540588801 + ... + 540588830.

It is an arithmetic number, because the mean of its divisors is an integer number (3243532896).

Almost surely, 2^16217664465 is an apocalyptic number.

16217664465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16217664465 is a deficient number, since it is larger than the sum of its proper divisors (9730598703).

16217664465 is a wasteful number, since it uses less digits than its factorization.

16217664465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081177639.

The product of its digits is 1451520, while the sum is 48.

The spelling of 16217664465 in words is "sixteen billion, two hundred seventeen million, six hundred sixty-four thousand, four hundred sixty-five".