38108689649 has 2 divisors, whose sum is σ = 38108689650. Its totient is φ = 38108689648.

The previous prime is 38108689643. The next prime is 38108689667. The reversal of 38108689649 is 94698680183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31659796624 + 6448893025 = 177932^2 + 80305^2 .

It is a cyclic number.

It is not a de Polignac number, because 38108689649 - 2²⁴ = 38091912433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 38108689591 and 38108689600.

It is not a weakly prime, because it can be changed into another prime (38108689643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19054344824 + 19054344825.

It is an arithmetic number, because the mean of its divisors is an integer number (19054344825).

Almost surely, 2^38108689649 is an apocalyptic number.

It is an amenable number.

38108689649 is a deficient number, since it is larger than the sum of its proper divisors (1).

38108689649 is an equidigital number, since it uses as much as digits as its factorization.

38108689649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17915904, while the sum is 62.

The spelling of 38108689649 in words is "thirty-eight billion, one hundred eight million, six hundred eighty-nine thousand, six hundred forty-nine".