1680148171 has 4 divisors (see below), whose sum is σ = 1809390352. Its totient is φ = 1550905992.

The previous prime is 1680148163. The next prime is 1680148201. The reversal of 1680148171 is 1718410861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1718410861 = 6869 ⋅250169.

It is a cyclic number.

It is not a de Polignac number, because 1680148171 - 2³ = 1680148163 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 1680148171.

It is not an unprimeable number, because it can be changed into a prime (1680148111) 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, 64621071 + ... + 64621096.

It is an arithmetic number, because the mean of its divisors is an integer number (452347588).

Almost surely, 2^1680148171 is an apocalyptic number.

1680148171 is a deficient number, since it is larger than the sum of its proper divisors (129242181).

1680148171 is a wasteful number, since it uses less digits than its factorization.

1680148171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129242180.

The product of its (nonzero) digits is 10752, while the sum is 37.

The square root of 1680148171 is about 40989.6105251075. The cubic root of 1680148171 is about 1188.8193386069.

The spelling of 1680148171 in words is "one billion, six hundred eighty million, one hundred forty-eight thousand, one hundred seventy-one".