216662433604 has 24 divisors (see below), whose sum is σ = 379610631288. Its totient is φ = 108202321920.

The previous prime is 216662433569. The next prime is 216662433643. The reversal of 216662433604 is 406334266612.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 28304697600 + 188357736004 = 168240^2 + 434002^2 .

It is a super-2 number, since 2×216662433604² (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, 17635944 + ... + 17648224.

It is an arithmetic number, because the mean of its divisors is an integer number (15817109637).

Almost surely, 2^216662433604 is an apocalyptic number.

It is an amenable number.

216662433604 is a deficient number, since it is larger than the sum of its proper divisors (162948197684).

216662433604 is a wasteful number, since it uses less digits than its factorization.

216662433604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17175 (or 17173 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 43.

The spelling of 216662433604 in words is "two hundred sixteen billion, six hundred sixty-two million, four hundred thirty-three thousand, six hundred four".