381821142449 has 8 divisors (see below), whose sum is σ = 389065110720. Its totient is φ = 374645192976.

The previous prime is 381821142427. The next prime is 381821142467. The reversal of 381821142449 is 944241128183.

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 381821142449 - 2²⁰ = 381820093873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381821142499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16993367 + ... + 17015820.

It is an arithmetic number, because the mean of its divisors is an integer number (48633138840).

Almost surely, 2^381821142449 is an apocalyptic number.

It is an amenable number.

381821142449 is a deficient number, since it is larger than the sum of its proper divisors (7243968271).

381821142449 is a wasteful number, since it uses less digits than its factorization.

381821142449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34009399.

The product of its digits is 442368, while the sum is 47.

The spelling of 381821142449 in words is "three hundred eighty-one billion, eight hundred twenty-one million, one hundred forty-two thousand, four hundred forty-nine".