216192578249 has 16 divisors (see below), whose sum is σ = 218285841600. Its totient is φ = 214108983360.

The previous prime is 216192578237. The next prime is 216192578267. The reversal of 216192578249 is 942875291612.

It is a cyclic number.

It is not a de Polignac number, because 216192578249 - 2¹² = 216192574153 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 216192578194 and 216192578203.

It is not an unprimeable number, because it can be changed into a prime (216192578209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119376554 + ... + 119378364.

It is an arithmetic number, because the mean of its divisors is an integer number (13642865100).

Almost surely, 2^216192578249 is an apocalyptic number.

It is an amenable number.

216192578249 is a deficient number, since it is larger than the sum of its proper divisors (2093263351).

216192578249 is a wasteful number, since it uses less digits than its factorization.

216192578249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3880.

The product of its digits is 4354560, while the sum is 56.

The spelling of 216192578249 in words is "two hundred sixteen billion, one hundred ninety-two million, five hundred seventy-eight thousand, two hundred forty-nine".