1440643400189 has 16 divisors (see below), whose sum is σ = 1656830706048. Its totient is φ = 1227075669312.

The previous prime is 1440643400171. The next prime is 1440643400201. The reversal of 1440643400189 is 9810043460441.

It is a cyclic number.

It is not a de Polignac number, because 1440643400189 - 2⁸ = 1440643399933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440643400149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 300422 + ... + 1723815.

It is an arithmetic number, because the mean of its divisors is an integer number (103551919128).

Almost surely, 2^{1440643400189} is an apocalyptic number.

It is an amenable number.

1440643400189 is a deficient number, since it is larger than the sum of its proper divisors (216187305859).

1440643400189 is a wasteful number, since it uses less digits than its factorization.

1440643400189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2024884.

The product of its (nonzero) digits is 331776, while the sum is 44.

The spelling of 1440643400189 in words is "one trillion, four hundred forty billion, six hundred forty-three million, four hundred thousand, one hundred eighty-nine".