83840442641 has 2 divisors, whose sum is σ = 83840442642. Its totient is φ = 83840442640.

The previous prime is 83840442629. The next prime is 83840442709. The reversal of 83840442641 is 14624404838.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62002992016 + 21837450625 = 249004^2 + 147775^2 .

It is a cyclic number.

It is not a de Polignac number, because 83840442641 - 2⁶ = 83840442577 is a prime.

It is a super-2 number, since 2×83840442641² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 83840442592 and 83840442601.

It is not a weakly prime, because it can be changed into another prime (83840402641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41920221320 + 41920221321.

It is an arithmetic number, because the mean of its divisors is an integer number (41920221321).

Almost surely, 2^83840442641 is an apocalyptic number.

It is an amenable number.

83840442641 is a deficient number, since it is larger than the sum of its proper divisors (1).

83840442641 is an equidigital number, since it uses as much as digits as its factorization.

83840442641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 589824, while the sum is 44.

The spelling of 83840442641 in words is "eighty-three billion, eight hundred forty million, four hundred forty-two thousand, six hundred forty-one".