83638191819 has 16 divisors (see below), whose sum is σ = 137252417792. Its totient is φ = 44116848288.

The previous prime is 83638191811. The next prime is 83638191821. The reversal of 83638191819 is 91819183638.

It is not a de Polignac number, because 83638191819 - 2³ = 83638191811 is a prime.

It is a super-2 number, since 2×83638191819² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (83638191811) 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, 153183229 + ... + 153183774.

It is an arithmetic number, because the mean of its divisors is an integer number (8578276112).

Almost surely, 2^83638191819 is an apocalyptic number.

83638191819 is a deficient number, since it is larger than the sum of its proper divisors (53614225973).

83638191819 is a wasteful number, since it uses less digits than its factorization.

83638191819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306367026.

The product of its digits is 2239488, while the sum is 57.

It can be divided in two parts, 8363819 and 1819, that added together give a palindrome (8365638).

The spelling of 83638191819 in words is "eighty-three billion, six hundred thirty-eight million, one hundred ninety-one thousand, eight hundred nineteen".