421506069768 has 192 divisors, whose sum is σ = 1355311077120. Its totient is φ = 115837747200.

The previous prime is 421506069763. The next prime is 421506069779. The reversal of 421506069768 is 867960605124.

421506069768 is a `hidden beast` number, since 4 + 2 + 1 + 506 + 0 + 69 + 76 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (421506069763) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1323496 + ... + 1610792.

It is an arithmetic number, because the mean of its divisors is an integer number (7058911860).

Almost surely, 2^421506069768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421506069768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (677655538560).

421506069768 is an abundant number, since it is smaller than the sum of its proper divisors (933805007352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421506069768 is a wasteful number, since it uses less digits than its factorization.

421506069768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287428 (or 287421 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 421506069768 in words is "four hundred twenty-one billion, five hundred six million, sixty-nine thousand, seven hundred sixty-eight".