381947872383 has 48 divisors (see below), whose sum is σ = 688859748096. Its totient is φ = 198119416320.

The previous prime is 381947872373. The next prime is 381947872409. The reversal of 381947872383 is 383278749183.

381947872383 is a `hidden beast` number, since 3 + 8 + 19 + 478 + 72 + 3 + 83 = 666.

It is not a de Polignac number, because 381947872383 - 2⁹ = 381947871871 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 381947872383.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381947872363) 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 47 ways as a sum of consecutive naturals, for example, 56916 + ... + 875862.

It is an arithmetic number, because the mean of its divisors is an integer number (14351244752).

Almost surely, 2^381947872383 is an apocalyptic number.

381947872383 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

381947872383 is a deficient number, since it is larger than the sum of its proper divisors (306911875713).

381947872383 is a wasteful number, since it uses less digits than its factorization.

381947872383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819644 (or 819641 counting only the distinct ones).

The product of its digits is 48771072, while the sum is 63.

The spelling of 381947872383 in words is "three hundred eighty-one billion, nine hundred forty-seven million, eight hundred seventy-two thousand, three hundred eighty-three".