421563448503 has 12 divisors (see below), whose sum is σ = 608932240488. Its totient is φ = 281038948560.

The previous prime is 421563448477. The next prime is 421563448513. The reversal of 421563448503 is 305844365124.

421563448503 is a `hidden beast` number, since 4 + 2 + 1 + 5 + 634 + 4 + 8 + 5 + 0 + 3 = 666.

It is not a de Polignac number, because 421563448503 - 2⁸ = 421563448247 is a prime.

It is a super-2 number, since 2×421563448503² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421563448513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 697501 + ... + 1153097.

It is an arithmetic number, because the mean of its divisors is an integer number (50744353374).

Almost surely, 2^421563448503 is an apocalyptic number.

421563448503 is a deficient number, since it is larger than the sum of its proper divisors (187368791985).

421563448503 is a wasteful number, since it uses less digits than its factorization.

421563448503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558414 (or 558411 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 45.

The spelling of 421563448503 in words is "four hundred twenty-one billion, five hundred sixty-three million, four hundred forty-eight thousand, five hundred three".