38556918777691 has 2 divisors, whose sum is σ = 38556918777692. Its totient is φ = 38556918777690.

The previous prime is 38556918777557. The next prime is 38556918777697. The reversal of 38556918777691 is 19677781965583.

38556918777691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38556918777691 - 2⁴¹ = 36357895522139 is a prime.

It is not a weakly prime, because it can be changed into another prime (38556918777697) 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, 19278459388845 + 19278459388846.

It is an arithmetic number, because the mean of its divisors is an integer number (19278459388846).

Almost surely, 2^{38556918777691} is an apocalyptic number.

38556918777691 is a deficient number, since it is larger than the sum of its proper divisors (1).

38556918777691 is an equidigital number, since it uses as much as digits as its factorization.

38556918777691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4800902400, while the sum is 82.

The spelling of 38556918777691 in words is "thirty-eight trillion, five hundred fifty-six billion, nine hundred eighteen million, seven hundred seventy-seven thousand, six hundred ninety-one".