421345646546 has 24 divisors (see below), whose sum is σ = 704482494912. Its totient is φ = 188823265400.

The previous prime is 421345646461. The next prime is 421345646587. The reversal of 421345646546 is 645646543124.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 421345646494 and 421345646503.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12244070 + ... + 12278433.

It is an arithmetic number, because the mean of its divisors is an integer number (29353437288).

Almost surely, 2^421345646546 is an apocalyptic number.

421345646546 is a deficient number, since it is larger than the sum of its proper divisors (283136848366).

421345646546 is a wasteful number, since it uses less digits than its factorization.

421345646546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24522598 (or 24522587 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 50.

The spelling of 421345646546 in words is "four hundred twenty-one billion, three hundred forty-five million, six hundred forty-six thousand, five hundred forty-six".