40845065845 has 4 divisors (see below), whose sum is σ = 49014079020. Its totient is φ = 32676052672.

The previous prime is 40845065773. The next prime is 40845065873. The reversal of 40845065845 is 54856054804.

40845065845 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 13461104484 + 27383961361 = 116022^2 + 165481^2 .

It is a cyclic number.

It is not a de Polignac number, because 40845065845 - 2²¹ = 40842968693 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4084506580 + ... + 4084506589.

It is an arithmetic number, because the mean of its divisors is an integer number (12253519755).

Almost surely, 2^40845065845 is an apocalyptic number.

It is an amenable number.

40845065845 is a deficient number, since it is larger than the sum of its proper divisors (8169013175).

40845065845 is an equidigital number, since it uses as much as digits as its factorization.

40845065845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8169013174.

The product of its (nonzero) digits is 3072000, while the sum is 49.

The spelling of 40845065845 in words is "forty billion, eight hundred forty-five million, sixty-five thousand, eight hundred forty-five".