40805090773 has 4 divisors (see below), whose sum is σ = 40871226060. Its totient is φ = 40738955488.

The previous prime is 40805090749. The next prime is 40805090791. The reversal of 40805090773 is 37709050804.

It is a happy number.

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 17678893444 + 23126197329 = 132962^2 + 152073^2 .

It is a cyclic number.

It is not a de Polignac number, because 40805090773 - 2⁵ = 40805090741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40805099773) 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, 33066718 + ... + 33067951.

It is an arithmetic number, because the mean of its divisors is an integer number (10217806515).

Almost surely, 2^40805090773 is an apocalyptic number.

It is an amenable number.

40805090773 is a deficient number, since it is larger than the sum of its proper divisors (66135287).

40805090773 is an equidigital number, since it uses as much as digits as its factorization.

40805090773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66135286.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 40805090773 in words is "forty billion, eight hundred five million, ninety thousand, seven hundred seventy-three".