61145613 has 12 divisors (see below), whose sum is σ = 90376000. Its totient is φ = 39815496.

The previous prime is 61145611. The next prime is 61145677. The reversal of 61145613 is 31654116.

61145613 is a `hidden beast` number, since 6 + 1 + 1 + 45 + 613 = 666.

It is not a de Polignac number, because 61145613 - 2¹ = 61145611 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61145611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78613 + ... + 79386.

Almost surely, 2^61145613 is an apocalyptic number.

It is an amenable number.

61145613 is a deficient number, since it is larger than the sum of its proper divisors (29230387).

61145613 is a wasteful number, since it uses less digits than its factorization.

61145613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158048 (or 158045 counting only the distinct ones).

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

The square root of 61145613 is about 7819.5660365522. The cubic root of 61145613 is about 393.9626962715.

Adding to 61145613 its reverse (31654116), we get a palindrome (92799729).

The spelling of 61145613 in words is "sixty-one million, one hundred forty-five thousand, six hundred thirteen".