61165589 has 4 divisors (see below), whose sum is σ = 61224300. Its totient is φ = 61106880.

The previous prime is 61165583. The next prime is 61165591. The reversal of 61165589 is 98556116.

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 54316900 + 6848689 = 7370^2 + 2617^2 .

It is a cyclic number.

It is not a de Polignac number, because 61165589 - 2⁸ = 61165333 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 (61165583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27764 + ... + 29885.

It is an arithmetic number, because the mean of its divisors is an integer number (15306075).

Almost surely, 2^61165589 is an apocalyptic number.

It is an amenable number.

61165589 is a deficient number, since it is larger than the sum of its proper divisors (58711).

61165589 is a wasteful number, since it uses less digits than its factorization.

61165589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58710.

The product of its digits is 64800, while the sum is 41.

The square root of 61165589 is about 7820.8432409811. The cubic root of 61165589 is about 394.0055935544.

The spelling of 61165589 in words is "sixty-one million, one hundred sixty-five thousand, five hundred eighty-nine".