38693641081 has 2 divisors, whose sum is σ = 38693641082. Its totient is φ = 38693641080.

The previous prime is 38693641069. The next prime is 38693641111. The reversal of 38693641081 is 18014639683.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38645269056 + 48372025 = 196584^2 + 6955^2 .

It is a cyclic number.

It is not a de Polignac number, because 38693641081 - 2⁹ = 38693640569 is a prime.

It is a super-2 number, since 2×38693641081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (38693651081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19346820540 + 19346820541.

It is an arithmetic number, because the mean of its divisors is an integer number (19346820541).

Almost surely, 2^38693641081 is an apocalyptic number.

It is an amenable number.

38693641081 is a deficient number, since it is larger than the sum of its proper divisors (1).

38693641081 is an equidigital number, since it uses as much as digits as its factorization.

38693641081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 746496, while the sum is 49.

The spelling of 38693641081 in words is "thirty-eight billion, six hundred ninety-three million, six hundred forty-one thousand, eighty-one".