160720860561 has 4 divisors (see below), whose sum is σ = 214294480752. Its totient is φ = 107147240372.

The previous prime is 160720860557. The next prime is 160720860571. The reversal of 160720860561 is 165068027061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 160720860561 - 2² = 160720860557 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (160720860541) 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, 26786810091 + ... + 26786810096.

It is an arithmetic number, because the mean of its divisors is an integer number (53573620188).

Almost surely, 2^160720860561 is an apocalyptic number.

It is an amenable number.

160720860561 is a deficient number, since it is larger than the sum of its proper divisors (53573620191).

160720860561 is an equidigital number, since it uses as much as digits as its factorization.

160720860561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53573620190.

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 160720860561 in words is "one hundred sixty billion, seven hundred twenty million, eight hundred sixty thousand, five hundred sixty-one".