421444445432 has 8 divisors (see below), whose sum is σ = 790208335200. Its totient is φ = 210722222712.

The previous prime is 421444445423. The next prime is 421444445437. The reversal of 421444445432 is 234544444124.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 421444445432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421444445437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26340277832 + ... + 26340277847.

It is an arithmetic number, because the mean of its divisors is an integer number (98776041900).

Almost surely, 2^421444445432 is an apocalyptic number.

It is an amenable number.

421444445432 is a deficient number, since it is larger than the sum of its proper divisors (368763889768).

421444445432 is a wasteful number, since it uses less digits than its factorization.

421444445432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52680555685 (or 52680555681 counting only the distinct ones).

The product of its digits is 983040, while the sum is 41.

Adding to 421444445432 its reverse (234544444124), we get a palindrome (655988889556).

The spelling of 421444445432 in words is "four hundred twenty-one billion, four hundred forty-four million, four hundred forty-five thousand, four hundred thirty-two".