3777566056813 has 2 divisors, whose sum is σ = 3777566056814. Its totient is φ = 3777566056812.

The previous prime is 3777566056801. The next prime is 3777566056903. The reversal of 3777566056813 is 3186506657773.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3477247808644 + 300318248169 = 1864738^2 + 548013^2 .

It is a cyclic number.

It is not a de Polignac number, because 3777566056813 - 2¹⁷ = 3777565925741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3777566050813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1888783028406 + 1888783028407.

It is an arithmetic number, because the mean of its divisors is an integer number (1888783028407).

Almost surely, 2^{3777566056813} is an apocalyptic number.

It is an amenable number.

3777566056813 is a deficient number, since it is larger than the sum of its proper divisors (1).

3777566056813 is an equidigital number, since it uses as much as digits as its factorization.

3777566056813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 133358400, while the sum is 64.

The spelling of 3777566056813 in words is "three trillion, seven hundred seventy-seven billion, five hundred sixty-six million, fifty-six thousand, eight hundred thirteen".