420266648623 has 2 divisors, whose sum is σ = 420266648624. Its totient is φ = 420266648622.

The previous prime is 420266648617. The next prime is 420266648647. The reversal of 420266648623 is 326846662024.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420266648623 is a prime.

It is a super-2 number, since 2×420266648623² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420266648603) 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, 210133324311 + 210133324312.

It is an arithmetic number, because the mean of its divisors is an integer number (210133324312).

Almost surely, 2^420266648623 is an apocalyptic number.

420266648623 is a deficient number, since it is larger than the sum of its proper divisors (1).

420266648623 is an equidigital number, since it uses as much as digits as its factorization.

420266648623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3981312, while the sum is 49.

The spelling of 420266648623 in words is "four hundred twenty billion, two hundred sixty-six million, six hundred forty-eight thousand, six hundred twenty-three".