6381081193391 has 8 divisors (see below), whose sum is σ = 6429954518064. Its totient is φ = 6332210335360.

The previous prime is 6381081193379. The next prime is 6381081193393. The reversal of 6381081193391 is 1933911801836.

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 6381081193391 - 2⁴² = 1983034682287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6381081193393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4755575 + ... + 5947911.

It is an arithmetic number, because the mean of its divisors is an integer number (803744314758).

Almost surely, 2^{6381081193391} is an apocalyptic number.

6381081193391 is a deficient number, since it is larger than the sum of its proper divisors (48873324673).

6381081193391 is a wasteful number, since it uses less digits than its factorization.

6381081193391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1233321.

The product of its (nonzero) digits is 839808, while the sum is 53.

The spelling of 6381081193391 in words is "six trillion, three hundred eighty-one billion, eighty-one million, one hundred ninety-three thousand, three hundred ninety-one".