65813983199 has 4 divisors (see below), whose sum is σ = 66417781320. Its totient is φ = 65210185080.

The previous prime is 65813983189. The next prime is 65813983217. The reversal of 65813983199 is 99138931856.

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 65813983199 - 2³² = 61519015903 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 (65813983189) 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, 301898897 + ... + 301899114.

It is an arithmetic number, because the mean of its divisors is an integer number (16604445330).

Almost surely, 2^65813983199 is an apocalyptic number.

65813983199 is a deficient number, since it is larger than the sum of its proper divisors (603798121).

65813983199 is a wasteful number, since it uses less digits than its factorization.

65813983199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603798120.

The product of its digits is 12597120, while the sum is 62.

The spelling of 65813983199 in words is "sixty-five billion, eight hundred thirteen million, nine hundred eighty-three thousand, one hundred ninety-nine".