420266646829 has 2 divisors, whose sum is σ = 420266646830. Its totient is φ = 420266646828.

The previous prime is 420266646823. The next prime is 420266646847. The reversal of 420266646829 is 928646662024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 417361221225 + 2905425604 = 646035^2 + 53902^2 .

It is a cyclic number.

It is not a de Polignac number, because 420266646829 - 2¹¹ = 420266644781 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420266646829.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420266646823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210133323414 + 210133323415.

It is an arithmetic number, because the mean of its divisors is an integer number (210133323415).

Almost surely, 2^420266646829 is an apocalyptic number.

It is an amenable number.

420266646829 is a deficient number, since it is larger than the sum of its proper divisors (1).

420266646829 is an equidigital number, since it uses as much as digits as its factorization.

420266646829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11943936, while the sum is 55.

The spelling of 420266646829 in words is "four hundred twenty billion, two hundred sixty-six million, six hundred forty-six thousand, eight hundred twenty-nine".