216261344973 has 8 divisors (see below), whose sum is σ = 289797448000. Its totient is φ = 143449735968.

The previous prime is 216261344903. The next prime is 216261344993. The reversal of 216261344973 is 379443162612.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-216261344973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216261344903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181122808 + ... + 181124001.

It is an arithmetic number, because the mean of its divisors is an integer number (36224681000).

Almost surely, 2^216261344973 is an apocalyptic number.

It is an amenable number.

216261344973 is a deficient number, since it is larger than the sum of its proper divisors (73536103027).

216261344973 is a wasteful number, since it uses less digits than its factorization.

216261344973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362247011.

The product of its digits is 1306368, while the sum is 48.

The spelling of 216261344973 in words is "two hundred sixteen billion, two hundred sixty-one million, three hundred forty-four thousand, nine hundred seventy-three".