1671171881 has 8 divisors (see below), whose sum is σ = 1752966144. Its totient is φ = 1590138880.

The previous prime is 1671171857. The next prime is 1671171907. The reversal of 1671171881 is 1881711761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1671171881 - 2¹⁰ = 1671170857 is a prime.

It is a super-2 number, since 2×1671171881² = 5585630911690156322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1671170881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185816 + ... + 194601.

It is an arithmetic number, because the mean of its divisors is an integer number (219120768).

Almost surely, 2^1671171881 is an apocalyptic number.

It is an amenable number.

1671171881 is a deficient number, since it is larger than the sum of its proper divisors (81794263).

1671171881 is a wasteful number, since it uses less digits than its factorization.

1671171881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380631.

The product of its digits is 18816, while the sum is 41.

The square root of 1671171881 is about 40879.9691903015. The cubic root of 1671171881 is about 1186.6984447980.

The spelling of 1671171881 in words is "one billion, six hundred seventy-one million, one hundred seventy-one thousand, eight hundred eighty-one".