38191111993 has 8 divisors (see below), whose sum is σ = 38329322976. Its totient is φ = 38053039200.

The previous prime is 38191111969. The next prime is 38191112053. The reversal of 38191111993 is 39911119183.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 38191111993 - 2²⁹ = 37654241081 is a prime.

It is a super-2 number, since 2×38191111993² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38191114993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 536130 + ... + 603172.

It is an arithmetic number, because the mean of its divisors is an integer number (4791165372).

Almost surely, 2^38191111993 is an apocalyptic number.

It is an amenable number.

38191111993 is a deficient number, since it is larger than the sum of its proper divisors (138210983).

38191111993 is a wasteful number, since it uses less digits than its factorization.

38191111993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69095.

The product of its digits is 52488, while the sum is 46.

The spelling of 38191111993 in words is "thirty-eight billion, one hundred ninety-one million, one hundred eleven thousand, nine hundred ninety-three".