421781067019 has 8 divisors (see below), whose sum is σ = 455993183520. Its totient is φ = 387821438976.

The previous prime is 421781067011. The next prime is 421781067047. The reversal of 421781067019 is 910760187124.

It is a happy number.

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 421781067019 - 2³ = 421781067011 is a prime.

It is a super-2 number, since 2×421781067019² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421781067019.

It is not an unprimeable number, because it can be changed into a prime (421781067011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63118639 + ... + 63125320.

It is an arithmetic number, because the mean of its divisors is an integer number (56999147940).

Almost surely, 2^421781067019 is an apocalyptic number.

421781067019 is a deficient number, since it is larger than the sum of its proper divisors (34212116501).

421781067019 is a wasteful number, since it uses less digits than its factorization.

421781067019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126244229.

The product of its (nonzero) digits is 169344, while the sum is 46.

The spelling of 421781067019 in words is "four hundred twenty-one billion, seven hundred eighty-one million, sixty-seven thousand, nineteen".