3956446621 has 8 divisors (see below), whose sum is σ = 3992228864. Its totient is φ = 3920736960.

The previous prime is 3956446619. The next prime is 3956446643. The reversal of 3956446621 is 1266446593.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 5-Lehmer number, since φ(3956446621) divides (3956446621-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 3956446621 - 2¹ = 3956446619 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 (3956446651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94501 + ... + 129781.

It is an arithmetic number, because the mean of its divisors is an integer number (499028608).

Almost surely, 2^3956446621 is an apocalyptic number.

3956446621 is the 36316-th hex number.

It is an amenable number.

3956446621 is a deficient number, since it is larger than the sum of its proper divisors (35782243).

3956446621 is a wasteful number, since it uses less digits than its factorization.

3956446621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36291.

The product of its digits is 933120, while the sum is 46.

The square root of 3956446621 is about 62900.2911042548. The cubic root of 3956446621 is about 1581.6186239155.

The spelling of 3956446621 in words is "three billion, nine hundred fifty-six million, four hundred forty-six thousand, six hundred twenty-one".