216191357579 has 2 divisors, whose sum is σ = 216191357580. Its totient is φ = 216191357578.

The previous prime is 216191357567. The next prime is 216191357587. The reversal of 216191357579 is 975753191612.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216191357579 - 2⁴ = 216191357563 is a prime.

It is not a weakly prime, because it can be changed into another prime (216191357549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108095678789 + 108095678790.

It is an arithmetic number, because the mean of its divisors is an integer number (108095678790).

Almost surely, 2^216191357579 is an apocalyptic number.

216191357579 is a deficient number, since it is larger than the sum of its proper divisors (1).

216191357579 is an equidigital number, since it uses as much as digits as its factorization.

216191357579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3572100, while the sum is 56.

The spelling of 216191357579 in words is "two hundred sixteen billion, one hundred ninety-one million, three hundred fifty-seven thousand, five hundred seventy-nine".