420206644399 has 2 divisors, whose sum is σ = 420206644400. Its totient is φ = 420206644398.

The previous prime is 420206644373. The next prime is 420206644447. The reversal of 420206644399 is 993446602024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420206644399 - 2⁵ = 420206644367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420206648399) 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, 210103322199 + 210103322200.

It is an arithmetic number, because the mean of its divisors is an integer number (210103322200).

Almost surely, 2^420206644399 is an apocalyptic number.

420206644399 is a deficient number, since it is larger than the sum of its proper divisors (1).

420206644399 is an equidigital number, since it uses as much as digits as its factorization.

420206644399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2239488, while the sum is 49.

The spelling of 420206644399 in words is "four hundred twenty billion, two hundred six million, six hundred forty-four thousand, three hundred ninety-nine".