420875581906 has 8 divisors (see below), whose sum is σ = 679875940044. Its totient is φ = 194250268560.

The previous prime is 420875581853. The next prime is 420875581913. The reversal of 420875581906 is 609185578024.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 383419785681 + 37455796225 = 619209^2 + 193535^2 .

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

It is a super-2 number, since 2×420875581906² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8093761165 + ... + 8093761216.

Almost surely, 2^420875581906 is an apocalyptic number.

420875581906 is a deficient number, since it is larger than the sum of its proper divisors (259000358138).

420875581906 is a wasteful number, since it uses less digits than its factorization.

420875581906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16187522396.

The product of its (nonzero) digits is 4838400, while the sum is 55.

The spelling of 420875581906 in words is "four hundred twenty billion, eight hundred seventy-five million, five hundred eighty-one thousand, nine hundred six".