160851681 has 12 divisors (see below), whose sum is σ = 233823252. Its totient is φ = 106550496.

The previous prime is 160851667. The next prime is 160851697. The reversal of 160851681 is 186158061.

160851681 is a `hidden beast` number, since 1 + 60 + 8 + 516 + 81 = 666.

160851681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 38638656 + 122213025 = 6216^2 + 11055^2 .

It is not a de Polignac number, because 160851681 - 2¹³ = 160843489 is a prime.

It is a super-2 number, since 2×160851681² = 51746526561051522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (160851611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55506 + ... + 58331.

It is an arithmetic number, because the mean of its divisors is an integer number (19485271).

Almost surely, 2^160851681 is an apocalyptic number.

It is an amenable number.

160851681 is a deficient number, since it is larger than the sum of its proper divisors (72971571).

160851681 is a wasteful number, since it uses less digits than its factorization.

160851681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114000 (or 113997 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 160851681 is about 12682.7316064009. The cubic root of 160851681 is about 543.8450766762.

It can be divided in two parts, 16085 and 1681, that added together give a triangular number (17766 = T₁₈₈).

The spelling of 160851681 in words is "one hundred sixty million, eight hundred fifty-one thousand, six hundred eighty-one".