216781471334 has 8 divisors (see below), whose sum is σ = 330683600520. Its totient is φ = 106553604496.

The previous prime is 216781471327. The next prime is 216781471363. The reversal of 216781471334 is 433174187612.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 918565439 + ... + 918565674.

It is an arithmetic number, because the mean of its divisors is an integer number (41335450065).

Almost surely, 2^216781471334 is an apocalyptic number.

216781471334 is a deficient number, since it is larger than the sum of its proper divisors (113902129186).

216781471334 is a wasteful number, since it uses less digits than its factorization.

216781471334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1837131174.

The product of its digits is 677376, while the sum is 47.

The spelling of 216781471334 in words is "two hundred sixteen billion, seven hundred eighty-one million, four hundred seventy-one thousand, three hundred thirty-four".