40065040073 has 4 divisors (see below), whose sum is σ = 40065638340. Its totient is φ = 40064441808.

The previous prime is 40065040019. The next prime is 40065040079. The reversal of 40065040073 is 37004056004.

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 24572757049 + 15492283024 = 156757^2 + 124468^2 .

It is a cyclic number.

It is not a de Polignac number, because 40065040073 - 2⁶ = 40065040009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40065040079) 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, 183878 + ... + 337551.

It is an arithmetic number, because the mean of its divisors is an integer number (10016409585).

Almost surely, 2^40065040073 is an apocalyptic number.

It is an amenable number.

40065040073 is a deficient number, since it is larger than the sum of its proper divisors (598267).

40065040073 is an equidigital number, since it uses as much as digits as its factorization.

40065040073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598266.

The product of its (nonzero) digits is 10080, while the sum is 29.

Adding to 40065040073 its reverse (37004056004), we get a palindrome (77069096077).

The spelling of 40065040073 in words is "forty billion, sixty-five million, forty thousand, seventy-three".