61365963019717 has 2 divisors, whose sum is σ = 61365963019718. Its totient is φ = 61365963019716.

The previous prime is 61365963019703. The next prime is 61365963019723. The reversal of 61365963019717 is 71791036956316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52193096821441 + 9172866198276 = 7224479^2 + 3028674^2 .

It is a cyclic number.

It is not a de Polignac number, because 61365963019717 - 2¹⁹ = 61365962495429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61365963010717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30682981509858 + 30682981509859.

It is an arithmetic number, because the mean of its divisors is an integer number (30682981509859).

Almost surely, 2^{61365963019717} is an apocalyptic number.

It is an amenable number.

61365963019717 is a deficient number, since it is larger than the sum of its proper divisors (1).

61365963019717 is an equidigital number, since it uses as much as digits as its factorization.

61365963019717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38578680, while the sum is 64.

The spelling of 61365963019717 in words is "sixty-one trillion, three hundred sixty-five billion, nine hundred sixty-three million, nineteen thousand, seven hundred seventeen".