83045748581 has 4 divisors (see below), whose sum is σ = 83191699500. Its totient is φ = 82899797664.

The previous prime is 83045748551. The next prime is 83045748593. The reversal of 83045748581 is 18584754038.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18584754038 = 2 ⋅9292377019.

It can be written as a sum of positive squares in 2 ways, for example, as 33479850625 + 49565897956 = 182975^2 + 222634^2 .

It is a cyclic number.

It is not a de Polignac number, because 83045748581 - 2⁶ = 83045748517 is a prime.

It is a super-2 number, since 2×83045748581² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83045748551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72974606 + ... + 72975743.

It is an arithmetic number, because the mean of its divisors is an integer number (20797924875).

Almost surely, 2^83045748581 is an apocalyptic number.

It is an amenable number.

83045748581 is a deficient number, since it is larger than the sum of its proper divisors (145950919).

83045748581 is a wasteful number, since it uses less digits than its factorization.

83045748581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145950918.

The product of its (nonzero) digits is 4300800, while the sum is 53.

The spelling of 83045748581 in words is "eighty-three billion, forty-five million, seven hundred forty-eight thousand, five hundred eighty-one".