38636693789 has 2 divisors, whose sum is σ = 38636693790. Its totient is φ = 38636693788.

The previous prime is 38636693749. The next prime is 38636693827. The reversal of 38636693789 is 98739663683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25714688164 + 12922005625 = 160358^2 + 113675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38636693789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38636693749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19318346894 + 19318346895.

It is an arithmetic number, because the mean of its divisors is an integer number (19318346895).

Almost surely, 2^38636693789 is an apocalyptic number.

It is an amenable number.

38636693789 is a deficient number, since it is larger than the sum of its proper divisors (1).

38636693789 is an equidigital number, since it uses as much as digits as its factorization.

38636693789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211631616, while the sum is 68.

The spelling of 38636693789 in words is "thirty-eight billion, six hundred thirty-six million, six hundred ninety-three thousand, seven hundred eighty-nine".