38168610661 has 2 divisors, whose sum is σ = 38168610662. Its totient is φ = 38168610660.

The previous prime is 38168610637. The next prime is 38168610671. The reversal of 38168610661 is 16601686183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33587892900 + 4580717761 = 183270^2 + 67681^2 .

It is a cyclic number.

It is not a de Polignac number, because 38168610661 - 2⁵ = 38168610629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38168610631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19084305330 + 19084305331.

It is an arithmetic number, because the mean of its divisors is an integer number (19084305331).

Almost surely, 2^38168610661 is an apocalyptic number.

It is an amenable number.

38168610661 is a deficient number, since it is larger than the sum of its proper divisors (1).

38168610661 is an equidigital number, since it uses as much as digits as its factorization.

38168610661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 46.

The spelling of 38168610661 in words is "thirty-eight billion, one hundred sixty-eight million, six hundred ten thousand, six hundred sixty-one".