1681158309 has 16 divisors (see below), whose sum is σ = 2264801280. Its totient is φ = 1109188080.

The previous prime is 1681158299. The next prime is 1681158317. The reversal of 1681158309 is 9038511861.

It is not a de Polignac number, because 1681158309 - 2⁸ = 1681158053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681158359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154374 + ... + 164904.

It is an arithmetic number, because the mean of its divisors is an integer number (141550080).

Almost surely, 2^1681158309 is an apocalyptic number.

It is an amenable number.

1681158309 is a deficient number, since it is larger than the sum of its proper divisors (583642971).

1681158309 is a wasteful number, since it uses less digits than its factorization.

1681158309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11080.

The product of its (nonzero) digits is 51840, while the sum is 42.

The square root of 1681158309 is about 41001.9305521094. The cubic root of 1681158309 is about 1189.0575380363.

The spelling of 1681158309 in words is "one billion, six hundred eighty-one million, one hundred fifty-eight thousand, three hundred nine".