40182221644 has 12 divisors (see below), whose sum is σ = 70572748624. Its totient is φ = 20018579184.

The previous prime is 40182221633. The next prime is 40182221713. The reversal of 40182221644 is 44612228104.

It is a super-2 number, since 2×40182221644² (a number of 22 digits) contains 22 as substring.

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, 18131664 + ... + 18133879.

Almost surely, 2^40182221644 is an apocalyptic number.

It is an amenable number.

40182221644 is a deficient number, since it is larger than the sum of its proper divisors (30390526980).

40182221644 is a wasteful number, since it uses less digits than its factorization.

40182221644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36265824 (or 36265822 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 34.

Adding to 40182221644 its reverse (44612228104), we get a palindrome (84794449748).

The spelling of 40182221644 in words is "forty billion, one hundred eighty-two million, two hundred twenty-one thousand, six hundred forty-four".