43861000018 has 16 divisors (see below), whose sum is σ = 72112707360. Its totient is φ = 19842328800.

The previous prime is 43861000009. The next prime is 43861000019. The reversal of 43861000018 is 81000016834.

It is not an unprimeable number, because it can be changed into a prime (43861000019) 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 7 ways as a sum of consecutive naturals, for example, 4719723 + ... + 4729006.

It is an arithmetic number, because the mean of its divisors is an integer number (4507044210).

Almost surely, 2^43861000018 is an apocalyptic number.

43861000018 is a deficient number, since it is larger than the sum of its proper divisors (28251707342).

43861000018 is a wasteful number, since it uses less digits than its factorization.

43861000018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9448953.

The product of its (nonzero) digits is 4608, while the sum is 31.

The spelling of 43861000018 in words is "forty-three billion, eight hundred sixty-one million, eighteen", and thus it is an aban number.