56120188609 has 3 divisors (see below), whose sum is σ = 56120425507. Its totient is φ = 56119951712.

The previous prime is 56120188601. The next prime is 56120188637. The reversal of 56120188609 is 90688102165.

The square root of 56120188609 is 236897.

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 can be written as a sum of positive squares in only one way, i.e., 15044249025 + 41075939584 = 122655^2 + 202672^2 .

It is not a de Polignac number, because 56120188609 - 2³ = 56120188601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56120188601) 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, 118449 + ... + 355345.

Almost surely, 2^56120188609 is an apocalyptic number.

56120188609 is the 236897-th square number.

56120188609 is the 118449-th centered octagonal number.

It is an amenable number.

56120188609 is a deficient number, since it is larger than the sum of its proper divisors (236898).

56120188609 is an frugal number, since it uses more digits than its factorization.

56120188609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473794 (or 236897 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 46.

The spelling of 56120188609 in words is "fifty-six billion, one hundred twenty million, one hundred eighty-eight thousand, six hundred nine".