3956859780493 has 2 divisors, whose sum is σ = 3956859780494. Its totient is φ = 3956859780492.

The previous prime is 3956859780443. The next prime is 3956859780529. The reversal of 3956859780493 is 3940879586593.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3398554929289 + 558304851204 = 1843517^2 + 747198^2 .

It is a cyclic number.

It is not a de Polignac number, because 3956859780493 - 2³³ = 3948269845901 is a prime.

It is a super-2 number, since 2×3956859780493² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3956859780403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1978429890246 + 1978429890247.

It is an arithmetic number, because the mean of its divisors is an integer number (1978429890247).

Almost surely, 2^{3956859780493} is an apocalyptic number.

It is an amenable number.

3956859780493 is a deficient number, since it is larger than the sum of its proper divisors (1).

3956859780493 is an equidigital number, since it uses as much as digits as its factorization.

3956859780493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1763596800, while the sum is 76.

The spelling of 3956859780493 in words is "three trillion, nine hundred fifty-six billion, eight hundred fifty-nine million, seven hundred eighty thousand, four hundred ninety-three".