381993264640893 has 16 divisors (see below), whose sum is σ = 510177059899200. Its totient is φ = 254235913451520.

The previous prime is 381993264640877. The next prime is 381993264640913. The reversal of 381993264640893 is 398046462399183.

It is not a de Polignac number, because 381993264640893 - 2⁴ = 381993264640877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381993264640873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5568403 + ... + 28195631.

It is an arithmetic number, because the mean of its divisors is an integer number (31886066243700).

Almost surely, 2^{381993264640893} is an apocalyptic number.

It is an amenable number.

381993264640893 is a deficient number, since it is larger than the sum of its proper divisors (128183795258307).

381993264640893 is a wasteful number, since it uses less digits than its factorization.

381993264640893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22636652.

The product of its (nonzero) digits is 1451188224, while the sum is 75.

The spelling of 381993264640893 in words is "three hundred eighty-one trillion, nine hundred ninety-three billion, two hundred sixty-four million, six hundred forty thousand, eight hundred ninety-three".