160457681 has 4 divisors (see below), whose sum is σ = 160483764. Its totient is φ = 160431600.

The previous prime is 160457663. The next prime is 160457699. The reversal of 160457681 is 186754061.

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

It is an interprime number because it is at equal distance from previous prime (160457663) and next prime (160457699).

It can be written as a sum of positive squares in 2 ways, for example, as 19228225 + 141229456 = 4385^2 + 11884^2 .

It is a cyclic number.

It is not a de Polignac number, because 160457681 - 2⁶ = 160457617 is a prime.

It is a super-2 number, since 2×160457681² = 51493334783795522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (160457981) 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, 1871 + ... + 18011.

It is an arithmetic number, because the mean of its divisors is an integer number (40120941).

Almost surely, 2^160457681 is an apocalyptic number.

It is an amenable number.

160457681 is a deficient number, since it is larger than the sum of its proper divisors (26083).

160457681 is an equidigital number, since it uses as much as digits as its factorization.

160457681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26082.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 160457681 is about 12667.1891515048. The cubic root of 160457681 is about 543.4006711010.

The spelling of 160457681 in words is "one hundred sixty million, four hundred fifty-seven thousand, six hundred eighty-one".