381191884372 has 18 divisors (see below), whose sum is σ = 718408480538. Its totient is φ = 175932661008.

The previous prime is 381191884363. The next prime is 381191884387. The reversal of 381191884372 is 273488191183.

It can be written as a sum of positive squares in only one way, i.e., 263902073796 + 117289810576 = 513714^2 + 342476^2 .

It is a super-2 number, since 2×381191884372² (a number of 24 digits) contains 22 as substring.

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 5 ways as a sum of consecutive naturals, for example, 4409379 + ... + 4494997.

Almost surely, 2^381191884372 is an apocalyptic number.

It is an amenable number.

381191884372 is a deficient number, since it is larger than the sum of its proper divisors (337216596166).

381191884372 is an frugal number, since it uses more digits than its factorization.

381191884372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171255 (or 85634 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 55.

The spelling of 381191884372 in words is "three hundred eighty-one billion, one hundred ninety-one million, eight hundred eighty-four thousand, three hundred seventy-two".