61310552617 has 2 divisors, whose sum is σ = 61310552618. Its totient is φ = 61310552616.

The previous prime is 61310552593. The next prime is 61310552657. The reversal of 61310552617 is 71625501316.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31276276201 + 30034276416 = 176851^2 + 173304^2 .

It is a cyclic number.

It is not a de Polignac number, because 61310552617 - 2¹¹ = 61310550569 is a prime.

It is not a weakly prime, because it can be changed into another prime (61310552657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30655276308 + 30655276309.

It is an arithmetic number, because the mean of its divisors is an integer number (30655276309).

Almost surely, 2^61310552617 is an apocalyptic number.

It is an amenable number.

61310552617 is a deficient number, since it is larger than the sum of its proper divisors (1).

61310552617 is an equidigital number, since it uses as much as digits as its factorization.

61310552617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 37.

The spelling of 61310552617 in words is "sixty-one billion, three hundred ten million, five hundred fifty-two thousand, six hundred seventeen".