83042994723781 has 4 divisors (see below), whose sum is σ = 83080117209132. Its totient is φ = 83005872238432.

The previous prime is 83042994723727. The next prime is 83042994723817. The reversal of 83042994723781 is 18732749924038.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 63245914452900 + 19797080270881 = 7952730^2 + 4449391^2 .

It is a cyclic number.

It is not a de Polignac number, because 83042994723781 - 2²⁵ = 83042961169349 is a prime.

It is a super-2 number, since 2×83042994723781² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83042994723881) 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, 18561239320 + ... + 18561243793.

It is an arithmetic number, because the mean of its divisors is an integer number (20770029302283).

Almost surely, 2^{83042994723781} is an apocalyptic number.

It is an amenable number.

83042994723781 is a deficient number, since it is larger than the sum of its proper divisors (37122485351).

83042994723781 is a wasteful number, since it uses less digits than its factorization.

83042994723781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37122485350.

The product of its (nonzero) digits is 146313216, while the sum is 67.

The spelling of 83042994723781 in words is "eighty-three trillion, forty-two billion, nine hundred ninety-four million, seven hundred twenty-three thousand, seven hundred eighty-one".