61715652017 has 2 divisors, whose sum is σ = 61715652018. Its totient is φ = 61715652016.

The previous prime is 61715651989. The next prime is 61715652023. The reversal of 61715652017 is 71025651716.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33533300641 + 28182351376 = 183121^2 + 167876^2 .

It is a cyclic number.

It is not a de Polignac number, because 61715652017 - 2¹⁶ = 61715586481 is a prime.

It is not a weakly prime, because it can be changed into another prime (61715652067) 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, 30857826008 + 30857826009.

It is an arithmetic number, because the mean of its divisors is an integer number (30857826009).

Almost surely, 2^61715652017 is an apocalyptic number.

It is an amenable number.

61715652017 is a deficient number, since it is larger than the sum of its proper divisors (1).

61715652017 is an equidigital number, since it uses as much as digits as its factorization.

61715652017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 88200, while the sum is 41.

The spelling of 61715652017 in words is "sixty-one billion, seven hundred fifteen million, six hundred fifty-two thousand, seventeen".