40421444234389 has 2 divisors, whose sum is σ = 40421444234390. Its totient is φ = 40421444234388.

The previous prime is 40421444234383. The next prime is 40421444234407. The reversal of 40421444234389 is 98343244412404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40397401251025 + 24042983364 = 6355895^2 + 155058^2 .

It is a cyclic number.

It is not a de Polignac number, because 40421444234389 - 2⁴¹ = 38222420978837 is a prime.

It is a super-3 number, since 3×40421444234389³ (a number of 42 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40421444234383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20210722117194 + 20210722117195.

It is an arithmetic number, because the mean of its divisors is an integer number (20210722117195).

Almost surely, 2^{40421444234389} is an apocalyptic number.

It is an amenable number.

40421444234389 is a deficient number, since it is larger than the sum of its proper divisors (1).

40421444234389 is an equidigital number, since it uses as much as digits as its factorization.

40421444234389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10616832, while the sum is 52.

The spelling of 40421444234389 in words is "forty trillion, four hundred twenty-one billion, four hundred forty-four million, two hundred thirty-four thousand, three hundred eighty-nine".