421543368536 has 32 divisors (see below), whose sum is σ = 809175407040. Its totient is φ = 205768112928.

The previous prime is 421543368517. The next prime is 421543368569. The reversal of 421543368536 is 635863345124.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 395015 + ... + 999561.

It is an arithmetic number, because the mean of its divisors is an integer number (25286731470).

Almost surely, 2^421543368536 is an apocalyptic number.

It is an amenable number.

421543368536 is a deficient number, since it is larger than the sum of its proper divisors (387632038504).

421543368536 is a wasteful number, since it uses less digits than its factorization.

421543368536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606623 (or 606619 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 50.

The spelling of 421543368536 in words is "four hundred twenty-one billion, five hundred forty-three million, three hundred sixty-eight thousand, five hundred thirty-six".