400843519589 has 2 divisors, whose sum is σ = 400843519590. Its totient is φ = 400843519588.

The previous prime is 400843519561. The next prime is 400843519621. The reversal of 400843519589 is 985915348004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 229592388964 + 171251130625 = 479158^2 + 413825^2 .

It is a cyclic number.

It is not a de Polignac number, because 400843519589 - 2¹² = 400843515493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400843519529) 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 as a sum of consecutive naturals, namely, 200421759794 + 200421759795.

It is an arithmetic number, because the mean of its divisors is an integer number (200421759795).

Almost surely, 2^400843519589 is an apocalyptic number.

It is an amenable number.

400843519589 is a deficient number, since it is larger than the sum of its proper divisors (1).

400843519589 is an equidigital number, since it uses as much as digits as its factorization.

400843519589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6220800, while the sum is 56.

The spelling of 400843519589 in words is "four hundred billion, eight hundred forty-three million, five hundred nineteen thousand, five hundred eighty-nine".