161560611 has 12 divisors (see below), whose sum is σ = 239672992. Its totient is φ = 104795856.

The previous prime is 161560603. The next prime is 161560613. The reversal of 161560611 is 116065161.

It is not a de Polignac number, because 161560611 - 2³ = 161560603 is a prime.

It is a super-2 number, since 2×161560611² = 52203662053386642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161560613) 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 in 11 ways as a sum of consecutive naturals, for example, 242251 + ... + 242916.

Almost surely, 2^161560611 is an apocalyptic number.

161560611 is a deficient number, since it is larger than the sum of its proper divisors (78112381).

161560611 is a wasteful number, since it uses less digits than its factorization.

161560611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485210 (or 485207 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 161560611 is about 12710.6495113350. The cubic root of 161560611 is about 544.6428780114.

It can be divided in two parts, 1615 and 60611, that added together give a palindrome (62226).

The spelling of 161560611 in words is "one hundred sixty-one million, five hundred sixty thousand, six hundred eleven".