420224549646 has 128 divisors (see below), whose sum is σ = 941414400000. Its totient is φ = 123977589120.

The previous prime is 420224549599. The next prime is 420224549687. The reversal of 420224549646 is 646945422024.

It is a junction number, because it is equal to n+sod(n) for n = 420224549595 and 420224549604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 185201400 + ... + 185203668.

It is an arithmetic number, because the mean of its divisors is an integer number (7354800000).

Almost surely, 2^420224549646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420224549646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (470707200000).

420224549646 is an abundant number, since it is smaller than the sum of its proper divisors (521189850354).

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

420224549646 is a wasteful number, since it uses less digits than its factorization.

420224549646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2782.

The product of its (nonzero) digits is 3317760, while the sum is 48.

The spelling of 420224549646 in words is "four hundred twenty billion, two hundred twenty-four million, five hundred forty-nine thousand, six hundred forty-six".