381212544856 has 128 divisors (see below), whose sum is σ = 878706662400. Its totient is φ = 152565050880.

The previous prime is 381212544851. The next prime is 381212544859. The reversal of 381212544856 is 658445212183.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381212544851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9425830 + ... + 9466186.

It is an arithmetic number, because the mean of its divisors is an integer number (6864895800).

Almost surely, 2^381212544856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 381212544856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (439353331200).

381212544856 is an abundant number, since it is smaller than the sum of its proper divisors (497494117544).

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

381212544856 is a wasteful number, since it uses less digits than its factorization.

381212544856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40769 (or 40765 counting only the distinct ones).

The product of its digits is 1843200, while the sum is 49.

The spelling of 381212544856 in words is "three hundred eighty-one billion, two hundred twelve million, five hundred forty-four thousand, eight hundred fifty-six".