289861638544 has 15 divisors (see below), whose sum is σ = 561611097217. Its totient is φ = 144929742496.

The previous prime is 289861638497. The next prime is 289861638553. The reversal of 289861638544 is 445836168982.

The square root of 289861638544 is 538388.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 16842848400 + 273018790144 = 129780^2 + 522512^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2086254 + ... + 2220850.

Almost surely, 2^289861638544 is an apocalyptic number.

289861638544 is the 538388-th square number.

It is an amenable number.

289861638544 is a deficient number, since it is larger than the sum of its proper divisors (271749458673).

289861638544 is an frugal number, since it uses more digits than its factorization.

289861638544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269202 (or 134599 counting only the distinct ones).

The product of its digits is 79626240, while the sum is 64.

Multiplying 289861638544 by its sum of digits (64), we get a square (18551144866816 = 4307104²).

The spelling of 289861638544 in words is "two hundred eighty-nine billion, eight hundred sixty-one million, six hundred thirty-eight thousand, five hundred forty-four".