4056335621 has 16 divisors (see below), whose sum is σ = 4443222000. Its totient is φ = 3680667648.

The previous prime is 4056335603. The next prime is 4056335651. The reversal of 4056335621 is 1265336504.

It can be written as a sum of positive squares in 8 ways, for example, as 773618596 + 3282717025 = 27814^2 + 57295^2 .

It is a cyclic number.

It is not a de Polignac number, because 4056335621 - 2¹⁸ = 4056073477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4056335651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177095 + ... + 198683.

It is an arithmetic number, because the mean of its divisors is an integer number (277701375).

Almost surely, 2^4056335621 is an apocalyptic number.

It is an amenable number.

4056335621 is a deficient number, since it is larger than the sum of its proper divisors (386886379).

4056335621 is a wasteful number, since it uses less digits than its factorization.

4056335621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21848.

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 4056335621 is about 63689.3681943855. The cubic root of 4056335621 is about 1594.8186061538.

The spelling of 4056335621 in words is "four billion, fifty-six million, three hundred thirty-five thousand, six hundred twenty-one".