61126613 has 4 divisors (see below), whose sum is σ = 62617548. Its totient is φ = 59635680.

The previous prime is 61126601. The next prime is 61126621. The reversal of 61126613 is 31662116.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6853924 + 54272689 = 2618^2 + 7367^2 .

It is a cyclic number.

It is not a de Polignac number, because 61126613 - 2¹⁸ = 60864469 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61126213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 745406 + ... + 745487.

It is an arithmetic number, because the mean of its divisors is an integer number (15654387).

Almost surely, 2^61126613 is an apocalyptic number.

It is an amenable number.

61126613 is a deficient number, since it is larger than the sum of its proper divisors (1490935).

61126613 is a wasteful number, since it uses less digits than its factorization.

61126613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1490934.

The product of its digits is 1296, while the sum is 26.

The square root of 61126613 is about 7818.3510409804. The cubic root of 61126613 is about 393.9218862210.

Adding to 61126613 its reverse (31662116), we get a palindrome (92788729).

The spelling of 61126613 in words is "sixty-one million, one hundred twenty-six thousand, six hundred thirteen".