381630966185 has 24 divisors (see below), whose sum is σ = 532968247296. Its totient is φ = 261570647520.

The previous prime is 381630966163. The next prime is 381630966187. The reversal of 381630966185 is 581669036183.

It is a happy number.

It is not a de Polignac number, because 381630966185 - 2¹⁶ = 381630900649 is a prime.

It is a super-2 number, since 2×381630966185² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 381630966185.

It is not an unprimeable number, because it can be changed into a prime (381630966187) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 186200 + ... + 893270.

It is an arithmetic number, because the mean of its divisors is an integer number (22207010304).

Almost surely, 2^381630966185 is an apocalyptic number.

381630966185 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

381630966185 is a deficient number, since it is larger than the sum of its proper divisors (151337281111).

381630966185 is a wasteful number, since it uses less digits than its factorization.

381630966185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709293 (or 709286 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 56.

The spelling of 381630966185 in words is "three hundred eighty-one billion, six hundred thirty million, nine hundred sixty-six thousand, one hundred eighty-five".