161347560461 has 2 divisors, whose sum is σ = 161347560462. Its totient is φ = 161347560460.

The previous prime is 161347560431. The next prime is 161347560481. The reversal of 161347560461 is 164065743161.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101828639236 + 59518921225 = 319106^2 + 243965^2 .

It is a cyclic number.

It is not a de Polignac number, because 161347560461 - 2¹⁰ = 161347559437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161347560431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80673780230 + 80673780231.

It is an arithmetic number, because the mean of its divisors is an integer number (80673780231).

Almost surely, 2^161347560461 is an apocalyptic number.

It is an amenable number.

161347560461 is a deficient number, since it is larger than the sum of its proper divisors (1).

161347560461 is an equidigital number, since it uses as much as digits as its factorization.

161347560461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 161347560461 in words is "one hundred sixty-one billion, three hundred forty-seven million, five hundred sixty thousand, four hundred sixty-one".