61355106089 has 2 divisors, whose sum is σ = 61355106090. Its totient is φ = 61355106088.

The previous prime is 61355106049. The next prime is 61355106157. The reversal of 61355106089 is 98060155316.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61347859225 + 7246864 = 247685^2 + 2692^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61355106089 is a prime.

It is not a weakly prime, because it can be changed into another prime (61355106049) 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, 30677553044 + 30677553045.

It is an arithmetic number, because the mean of its divisors is an integer number (30677553045).

Almost surely, 2^61355106089 is an apocalyptic number.

It is an amenable number.

61355106089 is a deficient number, since it is larger than the sum of its proper divisors (1).

61355106089 is an equidigital number, since it uses as much as digits as its factorization.

61355106089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 194400, while the sum is 44.

The spelling of 61355106089 in words is "sixty-one billion, three hundred fifty-five million, one hundred six thousand, eighty-nine".