381451878127 has 8 divisors (see below), whose sum is σ = 382899508992. Its totient is φ = 380005579800.

The previous prime is 381451878109. The next prime is 381451878257. The reversal of 381451878127 is 721878154183.

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 381451878127 - 2¹¹ = 381451876079 is a prime.

It is a super-2 number, since 2×381451878127² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381451878427) 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 7 ways as a sum of consecutive naturals, for example, 242352 + ... + 906442.

It is an arithmetic number, because the mean of its divisors is an integer number (47862438624).

Almost surely, 2^381451878127 is an apocalyptic number.

381451878127 is a deficient number, since it is larger than the sum of its proper divisors (1447630865).

381451878127 is a wasteful number, since it uses less digits than its factorization.

381451878127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666269.

The product of its digits is 3010560, while the sum is 55.

The spelling of 381451878127 in words is "three hundred eighty-one billion, four hundred fifty-one million, eight hundred seventy-eight thousand, one hundred twenty-seven".