420622416818 has 54 divisors (see below), whose sum is σ = 669053794941. Its totient is φ = 198312017904.

The previous prime is 420622416787. The next prime is 420622416821. The reversal of 420622416818 is 818614226024.

It can be written as a sum of positive squares in 2 ways, for example, as 401774696449 + 18847720369 = 633857^2 + 137287^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=458597.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2679123596 + ... + 2679123752.

Almost surely, 2^420622416818 is an apocalyptic number.

420622416818 is a deficient number, since it is larger than the sum of its proper divisors (248431378123).

420622416818 is an equidigital number, since it uses as much as digits as its factorization.

420622416818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616 (or 309 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 44.

The spelling of 420622416818 in words is "four hundred twenty billion, six hundred twenty-two million, four hundred sixteen thousand, eight hundred eighteen".