161615017 has 2 divisors, whose sum is σ = 161615018. Its totient is φ = 161615016.

The previous prime is 161614963. The next prime is 161615021. The reversal of 161615017 is 710516161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161061481 + 553536 = 12691^2 + 744^2 .

It is a cyclic number.

It is not a de Polignac number, because 161615017 - 2¹⁵ = 161582249 is a prime.

It is a super-2 number, since 2×161615017² = 52238827439820578, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (161615117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80807508 + 80807509.

It is an arithmetic number, because the mean of its divisors is an integer number (80807509).

Almost surely, 2^161615017 is an apocalyptic number.

It is an amenable number.

161615017 is a deficient number, since it is larger than the sum of its proper divisors (1).

161615017 is an equidigital number, since it uses as much as digits as its factorization.

161615017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 28.

The square root of 161615017 is about 12712.7895050614. The cubic root of 161615017 is about 544.7040078348.

The spelling of 161615017 in words is "one hundred sixty-one million, six hundred fifteen thousand, seventeen".