402144441109 has 2 divisors, whose sum is σ = 402144441110. Its totient is φ = 402144441108.

The previous prime is 402144441089. The next prime is 402144441113. The reversal of 402144441109 is 901144441204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 373470098884 + 28674342225 = 611122^2 + 169335^2 .

It is a cyclic number.

It is not a de Polignac number, because 402144441109 - 2²³ = 402136052501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402144541109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201072220554 + 201072220555.

It is an arithmetic number, because the mean of its divisors is an integer number (201072220555).

Almost surely, 2^402144441109 is an apocalyptic number.

It is an amenable number.

402144441109 is a deficient number, since it is larger than the sum of its proper divisors (1).

402144441109 is an equidigital number, since it uses as much as digits as its factorization.

402144441109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 34.

The spelling of 402144441109 in words is "four hundred two billion, one hundred forty-four million, four hundred forty-one thousand, one hundred nine".