56706722389 has 4 divisors (see below), whose sum is σ = 56707224300. Its totient is φ = 56706220480.

The previous prime is 56706722383. The next prime is 56706722407. The reversal of 56706722389 is 98322760765.

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, and also an emirpimes, since its reverse is a distinct semiprime: 98322760765 = 5 ⋅19664552153.

It can be written as a sum of positive squares in 2 ways, for example, as 19090119889 + 37616602500 = 138167^2 + 193950^2 .

It is a cyclic number.

It is not a de Polignac number, because 56706722389 - 2²⁷ = 56572504661 is a prime.

It is a super-2 number, since 2×56706722389² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56706722383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6687 + ... + 336835.

It is an arithmetic number, because the mean of its divisors is an integer number (14176806075).

Almost surely, 2^56706722389 is an apocalyptic number.

It is an amenable number.

56706722389 is a deficient number, since it is larger than the sum of its proper divisors (501911).

56706722389 is a wasteful number, since it uses less digits than its factorization.

56706722389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501910.

The product of its (nonzero) digits is 7620480, while the sum is 55.

The spelling of 56706722389 in words is "fifty-six billion, seven hundred six million, seven hundred twenty-two thousand, three hundred eighty-nine".