40043323169 has 2 divisors, whose sum is σ = 40043323170. Its totient is φ = 40043323168.

The previous prime is 40043323141. The next prime is 40043323171. The reversal of 40043323169 is 96132334004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20338182544 + 19705140625 = 142612^2 + 140375^2 .

It is a cyclic number.

It is not a de Polignac number, because 40043323169 - 2²⁰ = 40042274593 is a prime.

It is a super-2 number, since 2×40043323169² (a number of 22 digits) contains 22 as substring.

Together with 40043323171, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40043323109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20021661584 + 20021661585.

It is an arithmetic number, because the mean of its divisors is an integer number (20021661585).

Almost surely, 2^40043323169 is an apocalyptic number.

It is an amenable number.

40043323169 is a deficient number, since it is larger than the sum of its proper divisors (1).

40043323169 is an equidigital number, since it uses as much as digits as its factorization.

40043323169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 35.

The spelling of 40043323169 in words is "forty billion, forty-three million, three hundred twenty-three thousand, one hundred sixty-nine".