161347560617 has 2 divisors, whose sum is σ = 161347560618. Its totient is φ = 161347560616.

The previous prime is 161347560547. The next prime is 161347560631. The reversal of 161347560617 is 716065743161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138250856041 + 23096704576 = 371821^2 + 151976^2 .

It is a cyclic number.

It is not a de Polignac number, because 161347560617 - 2³⁴ = 144167691433 is a prime.

It is not a weakly prime, because it can be changed into another prime (161347560697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80673780308 + 80673780309.

It is an arithmetic number, because the mean of its divisors is an integer number (80673780309).

Almost surely, 2^161347560617 is an apocalyptic number.

It is an amenable number.

161347560617 is a deficient number, since it is larger than the sum of its proper divisors (1).

161347560617 is an equidigital number, since it uses as much as digits as its factorization.

161347560617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 635040, while the sum is 47.

The spelling of 161347560617 in words is "one hundred sixty-one billion, three hundred forty-seven million, five hundred sixty thousand, six hundred seventeen".