56723519889 has 21 divisors (see below), whose sum is σ = 85056017259. Its totient is φ = 37811392920.

The previous prime is 56723519861. The next prime is 56723519891. The reversal of 56723519889 is 98891532765.

The square root of 56723519889 is 238167.

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

56723519889 is a `hidden beast` number, since 56 + 72 + 351 + 98 + 89 = 666.

It can be written as a sum of positive squares in only one way, i.e., 35935647489 + 20787872400 = 189567^2 + 144180^2 .

It is not a de Polignac number, because 56723519889 - 2⁵ = 56723519857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56723519849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 6426099 + ... + 6434919.

Almost surely, 2^56723519889 is an apocalyptic number.

56723519889 is the 238167-th square number.

56723519889 is the 119084-th centered octagonal number.

It is an amenable number.

56723519889 is a deficient number, since it is larger than the sum of its proper divisors (28332497370).

56723519889 is an frugal number, since it uses more digits than its factorization.

56723519889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17660 (or 8824 counting only the distinct ones).

The product of its digits is 32659200, while the sum is 63.

The spelling of 56723519889 in words is "fifty-six billion, seven hundred twenty-three million, five hundred nineteen thousand, eight hundred eighty-nine".