38072775821 has 2 divisors, whose sum is σ = 38072775822. Its totient is φ = 38072775820.

The previous prime is 38072775803. The next prime is 38072775847. The reversal of 38072775821 is 12857727083.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20934038596 + 17138737225 = 144686^2 + 130915^2 .

It is an emirp because it is prime and its reverse (12857727083) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38072775821 - 2¹⁴ = 38072759437 is a prime.

It is a super-2 number, since 2×38072775821² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 38072775821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38072775421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19036387910 + 19036387911.

It is an arithmetic number, because the mean of its divisors is an integer number (19036387911).

Almost surely, 2^38072775821 is an apocalyptic number.

It is an amenable number.

38072775821 is a deficient number, since it is larger than the sum of its proper divisors (1).

38072775821 is an equidigital number, since it uses as much as digits as its factorization.

38072775821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1317120, while the sum is 50.

The spelling of 38072775821 in words is "thirty-eight billion, seventy-two million, seven hundred seventy-five thousand, eight hundred twenty-one".