61323566089 has 2 divisors, whose sum is σ = 61323566090. Its totient is φ = 61323566088.

The previous prime is 61323565951. The next prime is 61323566107. The reversal of 61323566089 is 98066532316.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39392325625 + 21931240464 = 198475^2 + 148092^2 .

It is a cyclic number.

It is not a de Polignac number, because 61323566089 - 2¹⁵ = 61323533321 is a prime.

It is not a weakly prime, because it can be changed into another prime (61323566389) 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 as a sum of consecutive naturals, namely, 30661783044 + 30661783045.

It is an arithmetic number, because the mean of its divisors is an integer number (30661783045).

Almost surely, 2^61323566089 is an apocalyptic number.

It is an amenable number.

61323566089 is a deficient number, since it is larger than the sum of its proper divisors (1).

61323566089 is an equidigital number, since it uses as much as digits as its factorization.

61323566089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1399680, while the sum is 49.

The spelling of 61323566089 in words is "sixty-one billion, three hundred twenty-three million, five hundred sixty-six thousand, eighty-nine".