61645113 has 12 divisors (see below), whose sum is σ = 89128468. Its totient is φ = 41057280.

The previous prime is 61645093. The next prime is 61645121. The reversal of 61645113 is 31154616.

61645113 is a `hidden beast` number, since 6 + 1 + 645 + 1 + 13 = 666.

61645113 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 40411449 + 21233664 = 6357^2 + 4608^2 .

It is not a de Polignac number, because 61645113 - 2¹³ = 61636921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61645193) 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 11 ways as a sum of consecutive naturals, for example, 9033 + ... + 14313.

Almost surely, 2^61645113 is an apocalyptic number.

It is an amenable number.

61645113 is a deficient number, since it is larger than the sum of its proper divisors (27483355).

61645113 is a wasteful number, since it uses less digits than its factorization.

61645113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6584 (or 6581 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 61645113 is about 7851.4401863607. The cubic root of 61645113 is about 395.0325519293.

Adding to 61645113 its reverse (31154616), we get a palindrome (92799729).

The spelling of 61645113 in words is "sixty-one million, six hundred forty-five thousand, one hundred thirteen".