56136645 has 28 divisors (see below), whose sum is σ = 101006316. Its totient is φ = 29937600.

The previous prime is 56136643. The next prime is 56136649. The reversal of 56136645 is 54663165.

56136645 is a `hidden beast` number, since 5 + 6 + 1 + 3 + 6 + 645 = 666.

56136645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 43046721 + 13089924 = 6561^2 + 3618^2 .

It is not a de Polignac number, because 56136645 - 2¹ = 56136643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56136643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 4056 + ... + 11345.

Almost surely, 2^56136645 is an apocalyptic number.

It is an amenable number.

56136645 is a deficient number, since it is larger than the sum of its proper divisors (44869671).

56136645 is an equidigital number, since it uses as much as digits as its factorization.

56136645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15424 (or 15409 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 56136645 is about 7492.4391889424. The cubic root of 56136645 is about 382.8971653190.

The spelling of 56136645 in words is "fifty-six million, one hundred thirty-six thousand, six hundred forty-five".