3806778556079 has 2 divisors, whose sum is σ = 3806778556080. Its totient is φ = 3806778556078.

The previous prime is 3806778556073. The next prime is 3806778556201. The reversal of 3806778556079 is 9706558776083.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3806778556079 is a prime.

It is a super-2 number, since 2×3806778556079² (a number of 26 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3806778556073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1903389278039 + 1903389278040.

It is an arithmetic number, because the mean of its divisors is an integer number (1903389278040).

Almost surely, 2^{3806778556079} is an apocalyptic number.

3806778556079 is a deficient number, since it is larger than the sum of its proper divisors (1).

3806778556079 is an equidigital number, since it uses as much as digits as its factorization.

3806778556079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 533433600, while the sum is 71.

The spelling of 3806778556079 in words is "three trillion, eight hundred six billion, seven hundred seventy-eight million, five hundred fifty-six thousand, seventy-nine".