3956806459999 has 4 divisors (see below), whose sum is σ = 3964401098640. Its totient is φ = 3949211821360.

The previous prime is 3956806459979. The next prime is 3956806460023. The reversal of 3956806459999 is 9999546086593.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3956806459999 - 2¹¹ = 3956806457951 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 (3956806459909) 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 3 ways as a sum of consecutive naturals, for example, 3797318539 + ... + 3797319580.

It is an arithmetic number, because the mean of its divisors is an integer number (991100274660).

Almost surely, 2^{3956806459999} is an apocalyptic number.

3956806459999 is a deficient number, since it is larger than the sum of its proper divisors (7594638641).

3956806459999 is an equidigital number, since it uses as much as digits as its factorization.

3956806459999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7594638640.

The product of its (nonzero) digits is 5101833600, while the sum is 82.

The spelling of 3956806459999 in words is "three trillion, nine hundred fifty-six billion, eight hundred six million, four hundred fifty-nine thousand, nine hundred ninety-nine".