16217161650665 has 32 divisors (see below), whose sum is σ = 20015598960000. Its totient is φ = 12606306465280.

The previous prime is 16217161650659. The next prime is 16217161650673. The reversal of 16217161650665 is 56605616171261.

It is not a de Polignac number, because 16217161650665 - 2⁶ = 16217161650601 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 183202586 + ... + 183291084.

It is an arithmetic number, because the mean of its divisors is an integer number (625487467500).

Almost surely, 2^{16217161650665} is an apocalyptic number.

It is an amenable number.

16217161650665 is a deficient number, since it is larger than the sum of its proper divisors (3798437309335).

16217161650665 is a wasteful number, since it uses less digits than its factorization.

16217161650665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92137.

The product of its (nonzero) digits is 2721600, while the sum is 53.

The spelling of 16217161650665 in words is "sixteen trillion, two hundred seventeen billion, one hundred sixty-one million, six hundred fifty thousand, six hundred sixty-five".