421098794784 has 144 divisors (see below), whose sum is σ = 1242835513920. Its totient is φ = 135083773440.

The previous prime is 421098794777. The next prime is 421098794803. The reversal of 421098794784 is 487497890124.

421098794784 is a `hidden beast` number, since 4 + 2 + 1 + 0 + 98 + 79 + 478 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

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 23 ways as a sum of consecutive naturals, for example, 2481949 + ... + 2646179.

It is an arithmetic number, because the mean of its divisors is an integer number (8630802180).

Almost surely, 2^421098794784 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 421098794784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (621417756960).

421098794784 is an abundant number, since it is smaller than the sum of its proper divisors (821736719136).

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

421098794784 is a wasteful number, since it uses less digits than its factorization.

421098794784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164583 (or 164572 counting only the distinct ones).

The product of its (nonzero) digits is 32514048, while the sum is 63.

The spelling of 421098794784 in words is "four hundred twenty-one billion, ninety-eight million, seven hundred ninety-four thousand, seven hundred eighty-four".