381450218724 has 72 divisors (see below), whose sum is σ = 969547138560.
Its totient is φ = 126448161600.
The previous prime is 381450218713. The next prime is 381450218729. The reversal of 381450218724 is 427812054183.
381450218724 is a `hidden beast` number, since 3 + 81 + 450 + 21 + 87 + 24 = 666.
It is a self number, because there is not a number n which added to its sum of digits gives 381450218724.
It is not an unprimeable number, because it can be changed into a prime (381450218729) 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 23 ways as a sum of consecutive naturals, for example, 35674219 + ... + 35684909.
It is an arithmetic number, because the mean of its divisors is an integer number (13465932480).
Almost surely, 2381450218724 is an apocalyptic number.
It is an amenable number.
381450218724 is an abundant number, since it is smaller than the sum of its proper divisors (588096919836).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
381450218724 is a wasteful number, since it uses less digits than its factorization.
381450218724 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 16081 (or 16076 counting only the distinct ones).
The product of its (nonzero) digits is 430080, while the sum is 45.
The spelling of 381450218724 in words is "three hundred eighty-one billion, four hundred fifty million, two hundred eighteen thousand, seven hundred twenty-four".