61135613 has 24 divisors (see below), whose sum is σ = 77757120. Its totient is φ = 47044800.

The previous prime is 61135589. The next prime is 61135631. The reversal of 61135613 is 31653116.

It is not a de Polignac number, because 61135613 - 2⁶ = 61135549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61135663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74978 + ... + 75788.

It is an arithmetic number, because the mean of its divisors is an integer number (3239880).

Almost surely, 2^61135613 is an apocalyptic number.

It is an amenable number.

61135613 is a deficient number, since it is larger than the sum of its proper divisors (16621507).

61135613 is a wasteful number, since it uses less digits than its factorization.

61135613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929 (or 918 counting only the distinct ones).

The product of its digits is 1620, while the sum is 26.

The square root of 61135613 is about 7818.9265887333. The cubic root of 61135613 is about 393.9412183515.

Adding to 61135613 its reverse (31653116), we get a palindrome (92788729).

The spelling of 61135613 in words is "sixty-one million, one hundred thirty-five thousand, six hundred thirteen".