216603433994 has 16 divisors (see below), whose sum is σ = 331862082048. Its totient is φ = 105983351952.

The previous prime is 216603433979. The next prime is 216603434027. The reversal of 216603433994 is 499334306612.

It is a super-2 number, since 2×216603433994² (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 7 ways as a sum of consecutive naturals, for example, 577232 + ... + 875444.

It is an arithmetic number, because the mean of its divisors is an integer number (20741380128).

Almost surely, 2^216603433994 is an apocalyptic number.

216603433994 is a deficient number, since it is larger than the sum of its proper divisors (115258648054).

216603433994 is a wasteful number, since it uses less digits than its factorization.

216603433994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305989.

The product of its (nonzero) digits is 2519424, while the sum is 50.

The spelling of 216603433994 in words is "two hundred sixteen billion, six hundred three million, four hundred thirty-three thousand, nine hundred ninety-four".