400440256067 has 2 divisors, whose sum is σ = 400440256068. Its totient is φ = 400440256066.

The previous prime is 400440256061. The next prime is 400440256081. The reversal of 400440256067 is 760652044004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400440256067 - 2¹⁸ = 400439993923 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400440256067.

It is not a weakly prime, because it can be changed into another prime (400440256061) 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, 200220128033 + 200220128034.

It is an arithmetic number, because the mean of its divisors is an integer number (200220128034).

Almost surely, 2^400440256067 is an apocalyptic number.

400440256067 is a deficient number, since it is larger than the sum of its proper divisors (1).

400440256067 is an equidigital number, since it uses as much as digits as its factorization.

400440256067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 161280, while the sum is 38.

The spelling of 400440256067 in words is "four hundred billion, four hundred forty million, two hundred fifty-six thousand, sixty-seven".