440442231399869 has 2 divisors, whose sum is σ = 440442231399870. Its totient is φ = 440442231399868.

The previous prime is 440442231399811. The next prime is 440442231400027. The reversal of 440442231399869 is 968993132244044.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 243167003878969 + 197275227520900 = 15593813^2 + 14045470^2 .

It is a cyclic number.

It is not a de Polignac number, because 440442231399869 - 2⁸ = 440442231399613 is a prime.

It is a super-2 number, since 2×440442231399869² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 440442231399799 and 440442231399808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440442231399809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220221115699934 + 220221115699935.

It is an arithmetic number, because the mean of its divisors is an integer number (220221115699935).

Almost surely, 2^{440442231399869} is an apocalyptic number.

It is an amenable number.

440442231399869 is a deficient number, since it is larger than the sum of its proper divisors (1).

440442231399869 is an equidigital number, since it uses as much as digits as its factorization.

440442231399869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322486272, while the sum is 68.

The spelling of 440442231399869 in words is "four hundred forty trillion, four hundred forty-two billion, two hundred thirty-one million, three hundred ninety-nine thousand, eight hundred sixty-nine".