216949942187 has 8 divisors (see below), whose sum is σ = 243069223152. Its totient is φ = 191896754400.

The previous prime is 216949942159. The next prime is 216949942211. The reversal of 216949942187 is 781249949612.

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

It is a cyclic number.

It is not a de Polignac number, because 216949942187 - 2⁸ = 216949941931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216949942487) 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, 266522864 + ... + 266523677.

It is an arithmetic number, because the mean of its divisors is an integer number (30383652894).

Almost surely, 2^216949942187 is an apocalyptic number.

216949942187 is a deficient number, since it is larger than the sum of its proper divisors (26119280965).

216949942187 is a wasteful number, since it uses less digits than its factorization.

216949942187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533046589.

The product of its digits is 15676416, while the sum is 62.

The spelling of 216949942187 in words is "two hundred sixteen billion, nine hundred forty-nine million, nine hundred forty-two thousand, one hundred eighty-seven".