38611968757 has 2 divisors, whose sum is σ = 38611968758. Its totient is φ = 38611968756.

The previous prime is 38611968721. The next prime is 38611968779. The reversal of 38611968757 is 75786911683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37726846756 + 885122001 = 194234^2 + 29751^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38611968757 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 38611968695 and 38611968704.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38611968557) 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, 19305984378 + 19305984379.

It is an arithmetic number, because the mean of its divisors is an integer number (19305984379).

Almost surely, 2^38611968757 is an apocalyptic number.

It is an amenable number.

38611968757 is a deficient number, since it is larger than the sum of its proper divisors (1).

38611968757 is an equidigital number, since it uses as much as digits as its factorization.

38611968757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15240960, while the sum is 61.

The spelling of 38611968757 in words is "thirty-eight billion, six hundred eleven million, nine hundred sixty-eight thousand, seven hundred fifty-seven".