83644646281 has 4 divisors (see below), whose sum is σ = 95593881472. Its totient is φ = 71695411092.

The previous prime is 83644646203. The next prime is 83644646297. The reversal of 83644646281 is 18264644638.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 83644646281 - 2⁹ = 83644645769 is a prime.

It is a super-2 number, since 2×83644646281² (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 (83644646581) 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, 5974617585 + ... + 5974617598.

It is an arithmetic number, because the mean of its divisors is an integer number (23898470368).

Almost surely, 2^83644646281 is an apocalyptic number.

It is an amenable number.

83644646281 is a deficient number, since it is larger than the sum of its proper divisors (11949235191).

83644646281 is a wasteful number, since it uses less digits than its factorization.

83644646281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11949235190.

The product of its digits is 5308416, while the sum is 52.

The spelling of 83644646281 in words is "eighty-three billion, six hundred forty-four million, six hundred forty-six thousand, two hundred eighty-one".