421203551544423 has 12 divisors (see below), whose sum is σ = 608549953945648. Its totient is φ = 280735525879200.

The previous prime is 421203551544403. The next prime is 421203551544533. The reversal of 421203551544423 is 324445155302124.

421203551544423 is a `hidden beast` number, since 4 + 2 + 1 + 2 + 0 + 3 + 55 + 154 + 442 + 3 = 666.

It is not a de Polignac number, because 421203551544423 - 2³⁰ = 421202477802599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421203551544403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5570111515 + ... + 5570187132.

Almost surely, 2^{421203551544423} is an apocalyptic number.

421203551544423 is a deficient number, since it is larger than the sum of its proper divisors (187346402401225).

421203551544423 is a wasteful number, since it uses less digits than its factorization.

421203551544423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11140302854 (or 11140302851 counting only the distinct ones).

The product of its (nonzero) digits is 2304000, while the sum is 45.

The spelling of 421203551544423 in words is "four hundred twenty-one trillion, two hundred three billion, five hundred fifty-one million, five hundred forty-four thousand, four hundred twenty-three".