56689861557289 has 3 divisors (see below), whose sum is σ = 56689869086557. Its totient is φ = 56689854028022.

The previous prime is 56689861557239. The next prime is 56689861557313. The reversal of 56689861557289 is 98275516898665.

The square root of 56689861557289 is 7529267.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a de Polignac number, because none of the positive numbers 2^k-56689861557289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56689861557229) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3764634 + ... + 11293900.

Almost surely, 2^{56689861557289} is an apocalyptic number.

56689861557289 is the 7529267-th square number.

56689861557289 is the 3764634-th centered octagonal number.

It is an amenable number.

56689861557289 is a deficient number, since it is larger than the sum of its proper divisors (7529268).

56689861557289 is an frugal number, since it uses more digits than its factorization.

56689861557289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15058534 (or 7529267 counting only the distinct ones).

The product of its digits is 15676416000, while the sum is 85.

The spelling of 56689861557289 in words is "fifty-six trillion, six hundred eighty-nine billion, eight hundred sixty-one million, five hundred fifty-seven thousand, two hundred eighty-nine".