381691788784 has 20 divisors (see below), whose sum is σ = 757565106480. Its totient is φ = 186191116160.

The previous prime is 381691788781. The next prime is 381691788791. The reversal of 381691788784 is 487887196183.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381691788781) 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 3 ways as a sum of consecutive naturals, for example, 290922964 + ... + 290924275.

It is an arithmetic number, because the mean of its divisors is an integer number (37878255324).

Almost surely, 2^381691788784 is an apocalyptic number.

It is an amenable number.

381691788784 is a deficient number, since it is larger than the sum of its proper divisors (375873317696).

381691788784 is a wasteful number, since it uses less digits than its factorization.

381691788784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581847288 (or 581847282 counting only the distinct ones).

The product of its digits is 130056192, while the sum is 70.

The spelling of 381691788784 in words is "three hundred eighty-one billion, six hundred ninety-one million, seven hundred eighty-eight thousand, seven hundred eighty-four".