1671961011 has 16 divisors (see below), whose sum is σ = 2658522624. Its totient is φ = 913866624.

The previous prime is 1671961001. The next prime is 1671961013. The reversal of 1671961011 is 1101691761.

It is not a de Polignac number, because 1671961011 - 2¹⁰ = 1671959987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1671961013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1730326 + ... + 1731291.

It is an arithmetic number, because the mean of its divisors is an integer number (166157664).

Almost surely, 2^1671961011 is an apocalyptic number.

1671961011 is a deficient number, since it is larger than the sum of its proper divisors (986561613).

1671961011 is a wasteful number, since it uses less digits than its factorization.

1671961011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3461650.

The product of its (nonzero) digits is 2268, while the sum is 33.

The square root of 1671961011 is about 40889.6198441609. The cubic root of 1671961011 is about 1186.8852023650.

The spelling of 1671961011 in words is "one billion, six hundred seventy-one million, nine hundred sixty-one thousand, eleven".