40444068081 has 4 divisors (see below), whose sum is σ = 53925424112. Its totient is φ = 26962712052.

The previous prime is 40444068047. The next prime is 40444068113. The reversal of 40444068081 is 18086044404.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 40444068081 - 2⁹ = 40444067569 is a prime.

It is a super-2 number, since 2×40444068081² (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 (40444068481) 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, 6740678011 + ... + 6740678016.

It is an arithmetic number, because the mean of its divisors is an integer number (13481356028).

Almost surely, 2^40444068081 is an apocalyptic number.

It is an amenable number.

40444068081 is a deficient number, since it is larger than the sum of its proper divisors (13481356031).

40444068081 is a wasteful number, since it uses less digits than its factorization.

40444068081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13481356030.

The product of its (nonzero) digits is 98304, while the sum is 39.

The spelling of 40444068081 in words is "forty billion, four hundred forty-four million, sixty-eight thousand, eighty-one".