38943986193 has 80 divisors (see below), whose sum is σ = 70016136960. Its totient is φ = 21090098304.

The previous prime is 38943986129. The next prime is 38943986209. The reversal of 38943986193 is 39168934983.

38943986193 is a `hidden beast` number, since 3 + 8 + 9 + 4 + 3 + 9 + 8 + 619 + 3 = 666.

It is not a de Polignac number, because 38943986193 - 2⁶ = 38943986129 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 38943986193.

It is not an unprimeable number, because it can be changed into a prime (38943986293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1407771 + ... + 1435167.

It is an arithmetic number, because the mean of its divisors is an integer number (875201712).

Almost surely, 2^38943986193 is an apocalyptic number.

It is an amenable number.

38943986193 is a deficient number, since it is larger than the sum of its proper divisors (31072150767).

38943986193 is a wasteful number, since it uses less digits than its factorization.

38943986193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27548 (or 27539 counting only the distinct ones).

The product of its digits is 30233088, while the sum is 63.

The spelling of 38943986193 in words is "thirty-eight billion, nine hundred forty-three million, nine hundred eighty-six thousand, one hundred ninety-three".