4145221656 has 80 divisors (see below), whose sum is σ = 12293459640. Its totient is φ = 1300458240.

The previous prime is 4145221573. The next prime is 4145221669. The reversal of 4145221656 is 6561225414.

4145221656 is a `hidden beast` number, since 41 + 452 + 2 + 165 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 4145221656.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 177130 + ... + 199161.

Almost surely, 2^4145221656 is an apocalyptic number.

It is an amenable number.

4145221656 is an abundant number, since it is smaller than the sum of its proper divisors (8148237984).

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

4145221656 is a wasteful number, since it uses less digits than its factorization.

4145221656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376326 (or 376313 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 4145221656 is about 64383.3958097893. The cubic root of 4145221656 is about 1606.3835672141.

The spelling of 4145221656 in words is "four billion, one hundred forty-five million, two hundred twenty-one thousand, six hundred fifty-six".