217433980678 has 8 divisors (see below), whose sum is σ = 326197778760. Its totient is φ = 108701387760.

The previous prime is 217433980637. The next prime is 217433980679. The reversal of 217433980678 is 876089334712.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217433980679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7783863 + ... + 7811746.

It is an arithmetic number, because the mean of its divisors is an integer number (40774722345).

Almost surely, 2^217433980678 is an apocalyptic number.

217433980678 is a deficient number, since it is larger than the sum of its proper divisors (108763798082).

217433980678 is a wasteful number, since it uses less digits than its factorization.

217433980678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15602582.

The product of its (nonzero) digits is 12192768, while the sum is 58.

The spelling of 217433980678 in words is "two hundred seventeen billion, four hundred thirty-three million, nine hundred eighty thousand, six hundred seventy-eight".