160720811605 has 4 divisors (see below), whose sum is σ = 192864973932. Its totient is φ = 128576649280.

The previous prime is 160720811593. The next prime is 160720811623. The reversal of 160720811605 is 506118027061.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 98449102756 + 62271708849 = 313766^2 + 249543^2 .

It is not a de Polignac number, because 160720811605 - 2⁹ = 160720811093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16072081156 + ... + 16072081165.

It is an arithmetic number, because the mean of its divisors is an integer number (48216243483).

Almost surely, 2^160720811605 is an apocalyptic number.

It is an amenable number.

160720811605 is a deficient number, since it is larger than the sum of its proper divisors (32144162327).

160720811605 is an equidigital number, since it uses as much as digits as its factorization.

160720811605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32144162326.

The product of its (nonzero) digits is 20160, while the sum is 37.

Adding to 160720811605 its reverse (506118027061), we get a palindrome (666838838666).

The spelling of 160720811605 in words is "one hundred sixty billion, seven hundred twenty million, eight hundred eleven thousand, six hundred five".