396221721846 has 32 divisors (see below), whose sum is σ = 861059097600. Its totient is φ = 121086433440.

The previous prime is 396221721811. The next prime is 396221721859. The reversal of 396221721846 is 648127122693.

396221721846 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56055001 + ... + 56062068.

It is an arithmetic number, because the mean of its divisors is an integer number (26908096800).

Almost surely, 2^396221721846 is an apocalyptic number.

396221721846 is an abundant number, since it is smaller than the sum of its proper divisors (464837375754).

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

396221721846 is a wasteful number, since it uses less digits than its factorization.

396221721846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112117124.

The product of its digits is 1741824, while the sum is 51.

The spelling of 396221721846 in words is "three hundred ninety-six billion, two hundred twenty-one million, seven hundred twenty-one thousand, eight hundred forty-six".