381450218727 has 16 divisors (see below), whose sum is σ = 522894497760. Its totient is φ = 247167470592.

The previous prime is 381450218713. The next prime is 381450218729. The reversal of 381450218727 is 727812054183.

It is not a de Polignac number, because 381450218727 - 2⁶ = 381450218663 is a prime.

It is a super-2 number, since 2×381450218727² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

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 (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1697202 + ... + 1908767.

It is an arithmetic number, because the mean of its divisors is an integer number (32680906110).

Almost surely, 2^381450218727 is an apocalyptic number.

381450218727 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

381450218727 is a deficient number, since it is larger than the sum of its proper divisors (141444279033).

381450218727 is a wasteful number, since it uses less digits than its factorization.

381450218727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3606962.

The product of its (nonzero) digits is 752640, while the sum is 48.

The spelling of 381450218727 in words is "three hundred eighty-one billion, four hundred fifty million, two hundred eighteen thousand, seven hundred twenty-seven".