61061660551349 has 2 divisors, whose sum is σ = 61061660551350. Its totient is φ = 61061660551348.

The previous prime is 61061660551343. The next prime is 61061660551391. The reversal of 61061660551349 is 94315506616016.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43786581482449 + 17275079068900 = 6617143^2 + 4156330^2 .

It is a cyclic number.

It is not a de Polignac number, because 61061660551349 - 2³⁶ = 60992941074613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61061660551349.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61061660551343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30530830275674 + 30530830275675.

It is an arithmetic number, because the mean of its divisors is an integer number (30530830275675).

Almost surely, 2^{61061660551349} is an apocalyptic number.

It is an amenable number.

61061660551349 is a deficient number, since it is larger than the sum of its proper divisors (1).

61061660551349 is an equidigital number, since it uses as much as digits as its factorization.

61061660551349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3499200, while the sum is 53.

The spelling of 61061660551349 in words is "sixty-one trillion, sixty-one billion, six hundred sixty million, five hundred fifty-one thousand, three hundred forty-nine".