2189460438544 has 10 divisors (see below), whose sum is σ = 4242079599710. Its totient is φ = 1094730219264.

The previous prime is 2189460438533. The next prime is 2189460438547. The reversal of 2189460438544 is 4458340649812.

It can be written as a sum of positive squares in only one way, i.e., 1668592227600 + 520868210944 = 1291740^2 + 721712^2 .

It is not an unprimeable number, because it can be changed into a prime (2189460438547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68420638689 + ... + 68420638720.

It is an arithmetic number, because the mean of its divisors is an integer number (424207959971).

Almost surely, 2^{2189460438544} is an apocalyptic number.

It is an amenable number.

2189460438544 is a deficient number, since it is larger than the sum of its proper divisors (2052619161166).

2189460438544 is a wasteful number, since it uses less digits than its factorization.

2189460438544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136841277417 (or 136841277411 counting only the distinct ones).

The product of its (nonzero) digits is 26542080, while the sum is 58.

The spelling of 2189460438544 in words is "two trillion, one hundred eighty-nine billion, four hundred sixty million, four hundred thirty-eight thousand, five hundred forty-four".