61036315609 has 2 divisors, whose sum is σ = 61036315610. Its totient is φ = 61036315608.

The previous prime is 61036315601. The next prime is 61036315693. The reversal of 61036315609 is 90651363016.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60924061584 + 112254025 = 246828^2 + 10595^2 .

It is a cyclic number.

It is not a de Polignac number, because 61036315609 - 2³ = 61036315601 is a prime.

It is not a weakly prime, because it can be changed into another prime (61036315601) 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, 30518157804 + 30518157805.

It is an arithmetic number, because the mean of its divisors is an integer number (30518157805).

Almost surely, 2^61036315609 is an apocalyptic number.

It is an amenable number.

61036315609 is a deficient number, since it is larger than the sum of its proper divisors (1).

61036315609 is an equidigital number, since it uses as much as digits as its factorization.

61036315609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 40.

The spelling of 61036315609 in words is "sixty-one billion, thirty-six million, three hundred fifteen thousand, six hundred nine".