381918274329 has 8 divisors (see below), whose sum is σ = 509415025792. Its totient is φ = 254516852880.

The previous prime is 381918274307. The next prime is 381918274379. The reversal of 381918274329 is 923472819183.

It is a happy number.

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

It is not a de Polignac number, because 381918274329 - 2⁹ = 381918273817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381918274379) 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, 23823154 + ... + 23839179.

It is an arithmetic number, because the mean of its divisors is an integer number (63676878224).

Almost surely, 2^381918274329 is an apocalyptic number.

It is an amenable number.

381918274329 is a deficient number, since it is larger than the sum of its proper divisors (127496751463).

381918274329 is a wasteful number, since it uses less digits than its factorization.

381918274329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47665007.

The product of its digits is 5225472, while the sum is 57.

The spelling of 381918274329 in words is "three hundred eighty-one billion, nine hundred eighteen million, two hundred seventy-four thousand, three hundred twenty-nine".