61357075309 has 2 divisors, whose sum is σ = 61357075310. Its totient is φ = 61357075308.

The previous prime is 61357075277. The next prime is 61357075343. The reversal of 61357075309 is 90357075316.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49249374084 + 12107701225 = 221922^2 + 110035^2 .

It is a cyclic number.

It is not a de Polignac number, because 61357075309 - 2⁵ = 61357075277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61357075369) 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 as a sum of consecutive naturals, namely, 30678537654 + 30678537655.

It is an arithmetic number, because the mean of its divisors is an integer number (30678537655).

Almost surely, 2^61357075309 is an apocalyptic number.

It is an amenable number.

61357075309 is a deficient number, since it is larger than the sum of its proper divisors (1).

61357075309 is an equidigital number, since it uses as much as digits as its factorization.

61357075309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 595350, while the sum is 46.

The spelling of 61357075309 in words is "sixty-one billion, three hundred fifty-seven million, seventy-five thousand, three hundred nine".