216610599969 has 12 divisors (see below), whose sum is σ = 313119206400. Its totient is φ = 144297576504.

The previous prime is 216610599871. The next prime is 216610599971. The reversal of 216610599969 is 969995016612.

216610599969 is a `hidden beast` number, since 2 + 1 + 6 + 610 + 5 + 9 + 9 + 9 + 6 + 9 = 666.

It is not a de Polignac number, because 216610599969 - 2⁸ = 216610599713 is a prime.

It is a super-2 number, since 2×216610599969² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (216610599769) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9111649 + ... + 9135390.

It is an arithmetic number, because the mean of its divisors is an integer number (26093267200).

Almost surely, 2^216610599969 is an apocalyptic number.

It is an amenable number.

216610599969 is a deficient number, since it is larger than the sum of its proper divisors (96508606431).

216610599969 is a wasteful number, since it uses less digits than its factorization.

216610599969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18248364 (or 18248361 counting only the distinct ones).

The product of its (nonzero) digits is 14171760, while the sum is 63.

The spelling of 216610599969 in words is "two hundred sixteen billion, six hundred ten million, five hundred ninety-nine thousand, nine hundred sixty-nine".