381821682494 has 64 divisors (see below), whose sum is σ = 702194634240. Its totient is φ = 152076165120.

The previous prime is 381821682479. The next prime is 381821682503. The reversal of 381821682494 is 494286128183.

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 31 ways as a sum of consecutive naturals, for example, 4250654 + ... + 4339550.

It is an arithmetic number, because the mean of its divisors is an integer number (10971791160).

Almost surely, 2^381821682494 is an apocalyptic number.

381821682494 is a deficient number, since it is larger than the sum of its proper divisors (320372951746).

381821682494 is a wasteful number, since it uses less digits than its factorization.

381821682494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89233.

The product of its digits is 5308416, while the sum is 56.

The spelling of 381821682494 in words is "three hundred eighty-one billion, eight hundred twenty-one million, six hundred eighty-two thousand, four hundred ninety-four".