38515685285449 has 2 divisors, whose sum is σ = 38515685285450. Its totient is φ = 38515685285448.

The previous prime is 38515685285437. The next prime is 38515685285459. The reversal of 38515685285449 is 94458258651583.

38515685285449 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 can be written as a sum of positive squares in only one way, i.e., 25061718044224 + 13453967241225 = 5006168^2 + 3667965^2 .

It is a cyclic number.

It is not a de Polignac number, because 38515685285449 - 2¹¹ = 38515685283401 is a prime.

It is a super-2 number, since 2×38515685285449² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (38515685285459) 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, 19257842642724 + 19257842642725.

It is an arithmetic number, because the mean of its divisors is an integer number (19257842642725).

Almost surely, 2^{38515685285449} is an apocalyptic number.

It is an amenable number.

38515685285449 is a deficient number, since it is larger than the sum of its proper divisors (1).

38515685285449 is an equidigital number, since it uses as much as digits as its factorization.

38515685285449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1658880000, while the sum is 73.

The spelling of 38515685285449 in words is "thirty-eight trillion, five hundred fifteen billion, six hundred eighty-five million, two hundred eighty-five thousand, four hundred forty-nine".