216754797839 has 4 divisors (see below), whose sum is σ = 218859213456. Its totient is φ = 214650382224.

The previous prime is 216754797811. The next prime is 216754797869. The reversal of 216754797839 is 938797457612.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 216754797839 - 2²⁸ = 216486362383 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 (216754797869) 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, 1052207654 + ... + 1052207859.

It is an arithmetic number, because the mean of its divisors is an integer number (54714803364).

Almost surely, 2^216754797839 is an apocalyptic number.

216754797839 is a deficient number, since it is larger than the sum of its proper divisors (2104415617).

216754797839 is a wasteful number, since it uses less digits than its factorization.

216754797839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2104415616.

The product of its digits is 160030080, while the sum is 68.

The spelling of 216754797839 in words is "two hundred sixteen billion, seven hundred fifty-four million, seven hundred ninety-seven thousand, eight hundred thirty-nine".