216642704636 has 48 divisors (see below), whose sum is σ = 406507917312. Its totient is φ = 100666540800.

The previous prime is 216642704591. The next prime is 216642704683. The reversal of 216642704636 is 636407246612.

It is a super-2 number, since 2×216642704636² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1762751 + ... + 1881641.

It is an arithmetic number, because the mean of its divisors is an integer number (8468914944).

Almost surely, 2^216642704636 is an apocalyptic number.

It is an amenable number.

216642704636 is a deficient number, since it is larger than the sum of its proper divisors (189865212676).

216642704636 is a wasteful number, since it uses less digits than its factorization.

216642704636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119250 (or 119248 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 47.

The spelling of 216642704636 in words is "two hundred sixteen billion, six hundred forty-two million, seven hundred four thousand, six hundred thirty-six".