10543671665 has 12 divisors (see below), whose sum is σ = 13103745564. Its totient is φ = 8144074176.

The previous prime is 10543671647. The next prime is 10543671701. The reversal of 10543671665 is 56617634501.

It can be written as a sum of positive squares in 6 ways, for example, as 77563249 + 10466108416 = 8807^2 + 102304^2 .

It is not a de Polignac number, because 10543671665 - 2¹⁸ = 10543409521 is a prime.

It is a super-2 number, since 2×10543671665² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1249502 + ... + 1257911.

It is an arithmetic number, because the mean of its divisors is an integer number (1091978797).

Almost surely, 2^10543671665 is an apocalyptic number.

It is an amenable number.

10543671665 is a deficient number, since it is larger than the sum of its proper divisors (2560073899).

10543671665 is an equidigital number, since it uses as much as digits as its factorization.

10543671665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2507476 (or 2507447 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 44.

The spelling of 10543671665 in words is "ten billion, five hundred forty-three million, six hundred seventy-one thousand, six hundred sixty-five".