216535590890 has 16 divisors (see below), whose sum is σ = 389815197408. Its totient is φ = 86602873296.

The previous prime is 216535590881. The next prime is 216535590919. The reversal of 216535590890 is 98095535612.

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, 1340132 + ... + 1492991.

It is an arithmetic number, because the mean of its divisors is an integer number (24363449838).

Almost surely, 2^216535590890 is an apocalyptic number.

216535590890 is a deficient number, since it is larger than the sum of its proper divisors (173279606518).

216535590890 is a wasteful number, since it uses less digits than its factorization.

216535590890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2840773.

The product of its (nonzero) digits is 2916000, while the sum is 53.

The spelling of 216535590890 in words is "two hundred sixteen billion, five hundred thirty-five million, five hundred ninety thousand, eight hundred ninety".