40956188221 has 6 divisors (see below), whose sum is σ = 44349008730. Its totient is φ = 37805712048.

The previous prime is 40956188219. The next prime is 40956188243. The reversal of 40956188221 is 12288165904.

It can be written as a sum of positive squares in 3 ways, for example, as 3795915321 + 37160272900 = 61611^2 + 192770^2 .

It is not a de Polignac number, because 40956188221 - 2¹ = 40956188219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40956188201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 121171986 + ... + 121172323.

It is an arithmetic number, because the mean of its divisors is an integer number (7391501455).

Almost surely, 2^40956188221 is an apocalyptic number.

It is an amenable number.

40956188221 is a deficient number, since it is larger than the sum of its proper divisors (3392820509).

40956188221 is a wasteful number, since it uses less digits than its factorization.

40956188221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242344335 (or 242344322 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 46.

The spelling of 40956188221 in words is "forty billion, nine hundred fifty-six million, one hundred eighty-eight thousand, two hundred twenty-one".