216465566914 has 8 divisors (see below), whose sum is σ = 343798253388. Its totient is φ = 101866149120.

The previous prime is 216465566857. The next prime is 216465566921. The reversal of 216465566914 is 419665564612.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 209656841689 + 6808725225 = 457883^2 + 82515^2 .

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

It is a super-2 number, since 2×216465566914² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3183317127 + ... + 3183317194.

Almost surely, 2^216465566914 is an apocalyptic number.

216465566914 is a deficient number, since it is larger than the sum of its proper divisors (127332686474).

216465566914 is a wasteful number, since it uses less digits than its factorization.

216465566914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6366634340.

The product of its digits is 9331200, while the sum is 55.

The spelling of 216465566914 in words is "two hundred sixteen billion, four hundred sixty-five million, five hundred sixty-six thousand, nine hundred fourteen".