6381388193691 has 16 divisors (see below), whose sum is σ = 9724225995008. Its totient is φ = 3646430330400.

The previous prime is 6381388193669. The next prime is 6381388193699. The reversal of 6381388193691 is 1963918831836.

It is not a de Polignac number, because 6381388193691 - 2⁷ = 6381388193563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6381388193699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2194045 + ... + 4192446.

It is an arithmetic number, because the mean of its divisors is an integer number (607764124688).

Almost surely, 2^{6381388193691} is an apocalyptic number.

6381388193691 is a deficient number, since it is larger than the sum of its proper divisors (3342837801317).

6381388193691 is a wasteful number, since it uses less digits than its factorization.

6381388193691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6434082.

The product of its digits is 40310784, while the sum is 66.

The spelling of 6381388193691 in words is "six trillion, three hundred eighty-one billion, three hundred eighty-eight million, one hundred ninety-three thousand, six hundred ninety-one".