421235534636 has 36 divisors (see below), whose sum is σ = 858247956216. Its totient is φ = 180375249600.

The previous prime is 421235534561. The next prime is 421235534651. The reversal of 421235534636 is 636435532124.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 688145 + ... + 1147176.

It is an arithmetic number, because the mean of its divisors is an integer number (23840221006).

Almost surely, 2^421235534636 is an apocalyptic number.

It is an amenable number.

421235534636 is an abundant number, since it is smaller than the sum of its proper divisors (437012421580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421235534636 is a wasteful number, since it uses less digits than its factorization.

421235534636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1836510 (or 1836501 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 44.

The spelling of 421235534636 in words is "four hundred twenty-one billion, two hundred thirty-five million, five hundred thirty-four thousand, six hundred thirty-six".