381806105485 has 16 divisors (see below), whose sum is σ = 523633251456. Its totient is φ = 261803176128.

The previous prime is 381806105453. The next prime is 381806105491. The reversal of 381806105485 is 584501608183.

It is a cyclic number.

It is not a de Polignac number, because 381806105485 - 2⁵ = 381806105453 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1518567 + ... + 1752043.

It is an arithmetic number, because the mean of its divisors is an integer number (32727078216).

Almost surely, 2^381806105485 is an apocalyptic number.

381806105485 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

381806105485 is a deficient number, since it is larger than the sum of its proper divisors (141827145971).

381806105485 is a wasteful number, since it uses less digits than its factorization.

381806105485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280212.

The product of its (nonzero) digits is 921600, while the sum is 49.

The spelling of 381806105485 in words is "three hundred eighty-one billion, eight hundred six million, one hundred five thousand, four hundred eighty-five".