3956539643 has 8 divisors (see below), whose sum is σ = 4614040800. Its totient is φ = 3391319400.

The previous prime is 3956539637. The next prime is 3956539667. The reversal of 3956539643 is 3469356593.

It is a de Polignac number, because none of the positive numbers 2^k-3956539643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3956539633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5767208 + ... + 5767893.

It is an arithmetic number, because the mean of its divisors is an integer number (576755100).

Almost surely, 2^3956539643 is an apocalyptic number.

3956539643 is a deficient number, since it is larger than the sum of its proper divisors (657501157).

3956539643 is an equidigital number, since it uses as much as digits as its factorization.

3956539643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11535122 (or 11535108 counting only the distinct ones).

The product of its digits is 7873200, while the sum is 53.

The square root of 3956539643 is about 62901.0305400476. The cubic root of 3956539643 is about 1581.6310192278.

The spelling of 3956539643 in words is "three billion, nine hundred fifty-six million, five hundred thirty-nine thousand, six hundred forty-three".