83640045340 has 24 divisors (see below), whose sum is σ = 175652672832. Its totient is φ = 33454384320.

The previous prime is 83640045311. The next prime is 83640045343. The reversal of 83640045340 is 4354004638.

It is a self number, because there is not a number n which added to its sum of digits gives 83640045340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83640045343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 371170 + ... + 552310.

It is an arithmetic number, because the mean of its divisors is an integer number (7318861368).

Almost surely, 2^83640045340 is an apocalyptic number.

It is an amenable number.

83640045340 is an abundant number, since it is smaller than the sum of its proper divisors (92012627492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

83640045340 is a wasteful number, since it uses less digits than its factorization.

83640045340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204237 (or 204235 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 37.

Adding to 83640045340 its reverse (4354004638), we get a palindrome (87994049978).

The spelling of 83640045340 in words is "eighty-three billion, six hundred forty million, forty-five thousand, three hundred forty".