1866000145444 has 12 divisors (see below), whose sum is σ = 3310233135244. Its totient is φ = 920219249664.

The previous prime is 1866000145421. The next prime is 1866000145453. The reversal of 1866000145444 is 4445410006681.

It can be written as a sum of positive squares in 2 ways, for example, as 355406745600 + 1510593399844 = 596160^2 + 1229062^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1866000145444.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3195205437 + ... + 3195206020.

Almost surely, 2^{1866000145444} is an apocalyptic number.

It is an amenable number.

1866000145444 is a deficient number, since it is larger than the sum of its proper divisors (1444232989800).

1866000145444 is a wasteful number, since it uses less digits than its factorization.

1866000145444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6390411534 (or 6390411532 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 43.

The spelling of 1866000145444 in words is "one trillion, eight hundred sixty-six billion, one hundred forty-five thousand, four hundred forty-four".