216261344972 has 48 divisors (see below), whose sum is σ = 392800235520. Its totient is φ = 104115316032.

The previous prime is 216261344903. The next prime is 216261344993. The reversal of 216261344972 is 279443162612.

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, 3397979 + ... + 3461037.

It is an arithmetic number, because the mean of its divisors is an integer number (8183338240).

Almost surely, 2^216261344972 is an apocalyptic number.

It is an amenable number.

216261344972 is a deficient number, since it is larger than the sum of its proper divisors (176538890548).

216261344972 is a wasteful number, since it uses less digits than its factorization.

216261344972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63390 (or 63388 counting only the distinct ones).

The product of its digits is 870912, while the sum is 47.

The spelling of 216261344972 in words is "two hundred sixteen billion, two hundred sixty-one million, three hundred forty-four thousand, nine hundred seventy-two".