83812642819 has 4 divisors (see below), whose sum is σ = 83819282544. Its totient is φ = 83806003096.

The previous prime is 83812642817. The next prime is 83812642867. The reversal of 83812642819 is 91824621838.

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 83812642819 - 2¹ = 83812642817 is a prime.

It is a super-2 number, since 2×83812642819² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83812642817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3300892 + ... + 3326185.

It is an arithmetic number, because the mean of its divisors is an integer number (20954820636).

Almost surely, 2^83812642819 is an apocalyptic number.

83812642819 is a deficient number, since it is larger than the sum of its proper divisors (6639725).

83812642819 is a wasteful number, since it uses less digits than its factorization.

83812642819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6639724.

The product of its digits is 1327104, while the sum is 52.

The spelling of 83812642819 in words is "eighty-three billion, eight hundred twelve million, six hundred forty-two thousand, eight hundred nineteen".