381818818182 has 16 divisors (see below), whose sum is σ = 782262945072. Its totient is φ = 124168721280.

The previous prime is 381818818103. The next prime is 381818818193. The reversal of 381818818182 is 281818818183.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 776054263 + ... + 776054754.

It is an arithmetic number, because the mean of its divisors is an integer number (48891434067).

Almost surely, 2^381818818182 is an apocalyptic number.

381818818182 is an abundant number, since it is smaller than the sum of its proper divisors (400444126890).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

381818818182 is a wasteful number, since it uses less digits than its factorization.

381818818182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1552109063.

The product of its digits is 1572864, while the sum is 57.

Subtracting from 381818818182 its reverse (281818818183), we obtain a palindrome (99999999999).

The spelling of 381818818182 in words is "three hundred eighty-one billion, eight hundred eighteen million, eight hundred eighteen thousand, one hundred eighty-two".