56699705689 has 9 divisors (see below), whose sum is σ = 62325696181. Its totient is φ = 51542805820.

The previous prime is 56699705687. The next prime is 56699705707. The reversal of 56699705689 is 98650799665.

The square root of 56699705689 is 238117.

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

56699705689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 56699705689 - 2¹ = 56699705687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56699705687) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2608464 + ... + 2630110.

Almost surely, 2^56699705689 is an apocalyptic number.

56699705689 is the 238117-th square number.

56699705689 is the 119059-th centered octagonal number.

It is an amenable number.

56699705689 is a deficient number, since it is larger than the sum of its proper divisors (5625990492).

56699705689 is an frugal number, since it uses more digits than its factorization.

56699705689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43316 (or 21658 counting only the distinct ones).

The product of its (nonzero) digits is 220449600, while the sum is 70.

The spelling of 56699705689 in words is "fifty-six billion, six hundred ninety-nine million, seven hundred five thousand, six hundred eighty-nine".