160681649 has 4 divisors (see below), whose sum is σ = 165864960. Its totient is φ = 155498340.

The previous prime is 160681643. The next prime is 160681681. The reversal of 160681649 is 946186061.

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 160681649 - 2¹² = 160677553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (160681643) 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, 2591609 + ... + 2591670.

It is an arithmetic number, because the mean of its divisors is an integer number (41466240).

Almost surely, 2^160681649 is an apocalyptic number.

It is an amenable number.

160681649 is a deficient number, since it is larger than the sum of its proper divisors (5183311).

160681649 is an equidigital number, since it uses as much as digits as its factorization.

160681649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5183310.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 160681649 is about 12676.0265462013. The cubic root of 160681649 is about 543.6533810977.

The spelling of 160681649 in words is "one hundred sixty million, six hundred eighty-one thousand, six hundred forty-nine".