38921849077 has 2 divisors, whose sum is σ = 38921849078. Its totient is φ = 38921849076.

The previous prime is 38921849069. The next prime is 38921849173. The reversal of 38921849077 is 77094812983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22621964836 + 16299884241 = 150406^2 + 127671^2 .

It is a cyclic number.

It is not a de Polignac number, because 38921849077 - 2³ = 38921849069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38921849377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19460924538 + 19460924539.

It is an arithmetic number, because the mean of its divisors is an integer number (19460924539).

Almost surely, 2^38921849077 is an apocalyptic number.

It is an amenable number.

38921849077 is a deficient number, since it is larger than the sum of its proper divisors (1).

38921849077 is an equidigital number, since it uses as much as digits as its factorization.

38921849077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6096384, while the sum is 58.

The spelling of 38921849077 in words is "thirty-eight billion, nine hundred twenty-one million, eight hundred forty-nine thousand, seventy-seven".