3956806460081 has 4 divisors (see below), whose sum is σ = 3956810438772. Its totient is φ = 3956802481392.

The previous prime is 3956806460041. The next prime is 3956806460161. The reversal of 3956806460081 is 1800646086593.

It is a happy number.

3956806460081 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2651820090481 + 1304986369600 = 1628441^2 + 1142360^2 .

It is a cyclic number.

It is not a de Polignac number, because 3956806460081 - 2³⁰ = 3955732718257 is a prime.

It is a super-2 number, since 2×3956806460081² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3956806459999 and 3956806460026.

It is not an unprimeable number, because it can be changed into a prime (3956806460041) 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 3 ways as a sum of consecutive naturals, for example, 955355 + ... + 2970911.

It is an arithmetic number, because the mean of its divisors is an integer number (989202609693).

Almost surely, 2^{3956806460081} is an apocalyptic number.

It is an amenable number.

3956806460081 is a deficient number, since it is larger than the sum of its proper divisors (3978691).

3956806460081 is a wasteful number, since it uses less digits than its factorization.

3956806460081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3978690.

The product of its (nonzero) digits is 7464960, while the sum is 56.

The spelling of 3956806460081 in words is "three trillion, nine hundred fifty-six billion, eight hundred six million, four hundred sixty thousand, eighty-one".