216430985673 has 96 divisors (see below), whose sum is σ = 375828710400. Its totient is φ = 117405687168.

The previous prime is 216430985651. The next prime is 216430985677. The reversal of 216430985673 is 376589034612.

216430985673 is a `hidden beast` number, since 2 + 1 + 6 + 430 + 98 + 56 + 73 = 666.

It is not a de Polignac number, because 216430985673 - 2⁶ = 216430985609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216430985677) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 80666190 + ... + 80668872.

It is an arithmetic number, because the mean of its divisors is an integer number (3914882400).

It is a 1-persistent number, because it is pandigital, but 2⋅216430985673 = 432861971346 is not.

Almost surely, 2^216430985673 is an apocalyptic number.

It is an amenable number.

216430985673 is a deficient number, since it is larger than the sum of its proper divisors (159397724727).

216430985673 is a wasteful number, since it uses less digits than its factorization.

216430985673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3451 (or 3448 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The spelling of 216430985673 in words is "two hundred sixteen billion, four hundred thirty million, nine hundred eighty-five thousand, six hundred seventy-three".