421044166919 has 8 divisors (see below), whose sum is σ = 424722596688. Its totient is φ = 417374507200.

The previous prime is 421044166913. The next prime is 421044166951. The reversal of 421044166919 is 919661440124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421044166919 - 2¹² = 421044162823 is a prime.

It is a super-2 number, since 2×421044166919² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421044166913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2096057 + ... + 2288130.

It is an arithmetic number, because the mean of its divisors is an integer number (53090324586).

Almost surely, 2^421044166919 is an apocalyptic number.

421044166919 is a deficient number, since it is larger than the sum of its proper divisors (3678429769).

421044166919 is a wasteful number, since it uses less digits than its factorization.

421044166919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4385025.

The product of its (nonzero) digits is 373248, while the sum is 47.

The spelling of 421044166919 in words is "four hundred twenty-one billion, forty-four million, one hundred sixty-six thousand, nine hundred nineteen".