160870781569 has 3 divisors (see below), whose sum is σ = 160871182657. Its totient is φ = 160870380482.

The previous prime is 160870781551. The next prime is 160870781593. The reversal of 160870781569 is 965187078061.

The square root of 160870781569 is 401087.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 160870781569 - 2⁵ = 160870781537 is a prime.

It is a super-2 number, since 2×160870781569² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (160870781549) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 200544 + ... + 601630.

Almost surely, 2^160870781569 is an apocalyptic number.

160870781569 is the 401087-th square number.

160870781569 is the 200544-th centered octagonal number.

It is an amenable number.

160870781569 is a deficient number, since it is larger than the sum of its proper divisors (401088).

160870781569 is an frugal number, since it uses more digits than its factorization.

160870781569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802174 (or 401087 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 58.

The spelling of 160870781569 in words is "one hundred sixty billion, eight hundred seventy million, seven hundred eighty-one thousand, five hundred sixty-nine".