40965321073 has 4 divisors (see below), whose sum is σ = 43375045860. Its totient is φ = 38555596288.

The previous prime is 40965321071. The next prime is 40965321113. The reversal of 40965321073 is 37012356904.

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 38434426209 + 2530894864 = 196047^2 + 50308^2 .

It is a cyclic number.

It is not a de Polignac number, because 40965321073 - 2¹ = 40965321071 is a prime.

It is a super-2 number, since 2×40965321073² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40965321071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1204862368 + ... + 1204862401.

It is an arithmetic number, because the mean of its divisors is an integer number (10843761465).

Almost surely, 2^40965321073 is an apocalyptic number.

It is an amenable number.

40965321073 is a deficient number, since it is larger than the sum of its proper divisors (2409724787).

40965321073 is a wasteful number, since it uses less digits than its factorization.

40965321073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2409724786.

The product of its (nonzero) digits is 136080, while the sum is 40.

Adding to 40965321073 its reverse (37012356904), we get a palindrome (77977677977).

The spelling of 40965321073 in words is "forty billion, nine hundred sixty-five million, three hundred twenty-one thousand, seventy-three".