61185089689 has 8 divisors (see below), whose sum is σ = 61382308680. Its totient is φ = 60988048896.

The previous prime is 61185089683. The next prime is 61185089711. The reversal of 61185089689 is 98698058116.

It can be written as a sum of positive squares in 4 ways, for example, as 16972878400 + 44212211289 = 130280^2 + 210267^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61185089689 - 2¹⁷ = 61184958617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61185089683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 661179 + ... + 748015.

It is an arithmetic number, because the mean of its divisors is an integer number (7672788585).

Almost surely, 2^61185089689 is an apocalyptic number.

It is an amenable number.

61185089689 is a deficient number, since it is larger than the sum of its proper divisors (197218991).

61185089689 is a wasteful number, since it uses less digits than its factorization.

61185089689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89099.

The product of its (nonzero) digits is 7464960, while the sum is 61.

The spelling of 61185089689 in words is "sixty-one billion, one hundred eighty-five million, eighty-nine thousand, six hundred eighty-nine".