420641906479 has 2 divisors, whose sum is σ = 420641906480. Its totient is φ = 420641906478.

The previous prime is 420641906473. The next prime is 420641906507. The reversal of 420641906479 is 974609146024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420641906479 - 2⁹ = 420641905967 is a prime.

It is a super-2 number, since 2×420641906479² (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 (420641906473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210320953239 + 210320953240.

It is an arithmetic number, because the mean of its divisors is an integer number (210320953240).

Almost surely, 2^420641906479 is an apocalyptic number.

420641906479 is a deficient number, since it is larger than the sum of its proper divisors (1).

420641906479 is an equidigital number, since it uses as much as digits as its factorization.

420641906479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2612736, while the sum is 52.

The spelling of 420641906479 in words is "four hundred twenty billion, six hundred forty-one million, nine hundred six thousand, four hundred seventy-nine".