160561811 has 4 divisors (see below), whose sum is σ = 161047224. Its totient is φ = 160076400.

The previous prime is 160561789. The next prime is 160561829. The reversal of 160561811 is 118165061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 118165061 = 7 ⋅16880723.

It is a cyclic number.

It is not a de Polignac number, because 160561811 - 2¹⁰ = 160560787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (160561711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242210 + ... + 242871.

It is an arithmetic number, because the mean of its divisors is an integer number (40261806).

Almost surely, 2^160561811 is an apocalyptic number.

160561811 is a deficient number, since it is larger than the sum of its proper divisors (485413).

160561811 is an equidigital number, since it uses as much as digits as its factorization.

160561811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485412.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 160561811 is about 12671.2987100770. The cubic root of 160561811 is about 543.5181934194.

The spelling of 160561811 in words is "one hundred sixty million, five hundred sixty-one thousand, eight hundred eleven".