4156221612 has 48 divisors (see below), whose sum is σ = 9752117760. Its totient is φ = 1377675648.

The previous prime is 4156221571. The next prime is 4156221779. The reversal of 4156221612 is 2161226514.

It is a self number, because there is not a number n which added to its sum of digits gives 4156221612.

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, 2899648 + ... + 2901080.

It is an arithmetic number, because the mean of its divisors is an integer number (203169120).

Almost surely, 2^4156221612 is an apocalyptic number.

It is an amenable number.

4156221612 is an abundant number, since it is smaller than the sum of its proper divisors (5595896148).

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

4156221612 is a wasteful number, since it uses less digits than its factorization.

4156221612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2622 (or 2620 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 4156221612 is about 64468.7646228776. The cubic root of 4156221612 is about 1607.8032372914.

The spelling of 4156221612 in words is "four billion, one hundred fifty-six million, two hundred twenty-one thousand, six hundred twelve".