421730851508 has 12 divisors (see below), whose sum is σ = 748423765152. Its totient is φ = 207895490040.

The previous prime is 421730851441. The next prime is 421730851513. The reversal of 421730851508 is 805158037124.

It is a super-2 number, since 2×421730851508² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 742483610 + ... + 742484177.

It is an arithmetic number, because the mean of its divisors is an integer number (62368647096).

Almost surely, 2^421730851508 is an apocalyptic number.

It is an amenable number.

421730851508 is a deficient number, since it is larger than the sum of its proper divisors (326692913644).

421730851508 is a wasteful number, since it uses less digits than its factorization.

421730851508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1484967862 (or 1484967860 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 44.

The spelling of 421730851508 in words is "four hundred twenty-one billion, seven hundred thirty million, eight hundred fifty-one thousand, five hundred eight".