1681158307 has 4 divisors (see below), whose sum is σ = 1726595056. Its totient is φ = 1635721560.

The previous prime is 1681158299. The next prime is 1681158317. The reversal of 1681158307 is 7038511861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7038511861 = 41 ⋅171671021.

It is a cyclic number.

It is not a de Polignac number, because 1681158307 - 2³ = 1681158299 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1681158307.

It is not an unprimeable number, because it can be changed into a prime (1681158317) 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 3 ways as a sum of consecutive naturals, for example, 22718319 + ... + 22718392.

It is an arithmetic number, because the mean of its divisors is an integer number (431648764).

Almost surely, 2^1681158307 is an apocalyptic number.

1681158307 is a deficient number, since it is larger than the sum of its proper divisors (45436749).

1681158307 is an equidigital number, since it uses as much as digits as its factorization.

1681158307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45436748.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 1681158307 is about 41001.9305277203. The cubic root of 1681158307 is about 1189.0575375648.

The spelling of 1681158307 in words is "one billion, six hundred eighty-one million, one hundred fifty-eight thousand, three hundred seven".