38466321689 has 2 divisors, whose sum is σ = 38466321690. Its totient is φ = 38466321688.

The previous prime is 38466321679. The next prime is 38466321739. The reversal of 38466321689 is 98612366483.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20317651600 + 18148670089 = 142540^2 + 134717^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38466321689 is a prime.

It is not a weakly prime, because it can be changed into another prime (38466321679) 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, 19233160844 + 19233160845.

It is an arithmetic number, because the mean of its divisors is an integer number (19233160845).

Almost surely, 2^38466321689 is an apocalyptic number.

It is an amenable number.

38466321689 is a deficient number, since it is larger than the sum of its proper divisors (1).

38466321689 is an equidigital number, since it uses as much as digits as its factorization.

38466321689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8957952, while the sum is 56.

The spelling of 38466321689 in words is "thirty-eight billion, four hundred sixty-six million, three hundred twenty-one thousand, six hundred eighty-nine".