289357798139545 has 8 divisors (see below), whose sum is σ = 367654614106824. Its totient is φ = 217869400952064.

The previous prime is 289357798139471. The next prime is 289357798139549. The reversal of 289357798139545 is 545931897753982.

It can be written as a sum of positive squares in 4 ways, for example, as 5776778601049 + 283581019538496 = 2403493^2 + 16839864^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 289357798139545 - 2¹¹ = 289357798137497 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (85), and also a Moran number because the ratio is a prime number: 3404209389877 = 289357798139545 / (2 + 8 + 9 + 3 + 5 + 7 + 7 + 9 + 8 + 1 + 3 + 9 + 5 + 4 + 5).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289357798139549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1702104694854 + ... + 1702104695023.

It is an arithmetic number, because the mean of its divisors is an integer number (45956826763353).

Almost surely, 2^{289357798139545} is an apocalyptic number.

It is an amenable number.

289357798139545 is a deficient number, since it is larger than the sum of its proper divisors (78296815967279).

289357798139545 is a wasteful number, since it uses less digits than its factorization.

289357798139545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3404209389899.

The product of its digits is 20575296000, while the sum is 85.

The spelling of 289357798139545 in words is "two hundred eighty-nine trillion, three hundred fifty-seven billion, seven hundred ninety-eight million, one hundred thirty-nine thousand, five hundred forty-five".