381450218612 has 12 divisors (see below), whose sum is σ = 667549138116. Its totient is φ = 190721893440.

The previous prime is 381450218609. The next prime is 381450218621. The reversal of 381450218612 is 216812054183.

It can be written as a sum of positive squares in 2 ways, for example, as 299193684196 + 82256534416 = 546986^2 + 286804^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 381450218612.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 526439 + ... + 1019822.

It is an arithmetic number, because the mean of its divisors is an integer number (55629094843).

Almost surely, 2^381450218612 is an apocalyptic number.

It is an amenable number.

381450218612 is a deficient number, since it is larger than the sum of its proper divisors (286098919504).

381450218612 is a wasteful number, since it uses less digits than its factorization.

381450218612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1607938 (or 1607936 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 41.

The spelling of 381450218612 in words is "three hundred eighty-one billion, four hundred fifty million, two hundred eighteen thousand, six hundred twelve".