216696512519665 has 64 divisors (see below), whose sum is σ = 275876455219200. Its totient is φ = 163061054956800.

The previous prime is 216696512519657. The next prime is 216696512519701. The reversal of 216696512519665 is 566915215696612.

It is not a de Polignac number, because 216696512519665 - 2³ = 216696512519657 is a prime.

It is a Smith number, since the sum of its digits (70) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 216696512519594 and 216696512519603.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14620902955 + ... + 14620917775.

It is an arithmetic number, because the mean of its divisors is an integer number (4310569612800).

Almost surely, 2^{216696512519665} is an apocalyptic number.

It is an amenable number.

216696512519665 is a deficient number, since it is larger than the sum of its proper divisors (59179942699535).

216696512519665 is a wasteful number, since it uses less digits than its factorization.

216696512519665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19438.

The product of its digits is 314928000, while the sum is 70.

The spelling of 216696512519665 in words is "two hundred sixteen trillion, six hundred ninety-six billion, five hundred twelve million, five hundred nineteen thousand, six hundred sixty-five".