61368255523009 has 2 divisors, whose sum is σ = 61368255523010. Its totient is φ = 61368255523008.

The previous prime is 61368255522991. The next prime is 61368255523033. The reversal of 61368255523009 is 90032555286316.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52828839039025 + 8539416483984 = 7268345^2 + 2922228^2 .

It is a cyclic number.

It is not a de Polignac number, because 61368255523009 - 2¹¹ = 61368255520961 is a prime.

It is not a weakly prime, because it can be changed into another prime (61368255523909) 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, 30684127761504 + 30684127761505.

It is an arithmetic number, because the mean of its divisors is an integer number (30684127761505).

Almost surely, 2^{61368255523009} is an apocalyptic number.

It is an amenable number.

61368255523009 is a deficient number, since it is larger than the sum of its proper divisors (1).

61368255523009 is an equidigital number, since it uses as much as digits as its factorization.

61368255523009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664000, while the sum is 55.

The spelling of 61368255523009 in words is "sixty-one trillion, three hundred sixty-eight billion, two hundred fifty-five million, five hundred twenty-three thousand, nine".