216878759579 has 2 divisors, whose sum is σ = 216878759580. Its totient is φ = 216878759578.

The previous prime is 216878759567. The next prime is 216878759623. The reversal of 216878759579 is 975957878612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216878759579 - 2²⁰ = 216877711003 is a prime.

It is not a weakly prime, because it can be changed into another prime (216878759519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108439379789 + 108439379790.

It is an arithmetic number, because the mean of its divisors is an integer number (108439379790).

Almost surely, 2^216878759579 is an apocalyptic number.

216878759579 is a deficient number, since it is larger than the sum of its proper divisors (1).

216878759579 is an equidigital number, since it uses as much as digits as its factorization.

216878759579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 533433600, while the sum is 74.

The spelling of 216878759579 in words is "two hundred sixteen billion, eight hundred seventy-eight million, seven hundred fifty-nine thousand, five hundred seventy-nine".