10894091689 has 18 divisors (see below), whose sum is σ = 11855265210. Its totient is φ = 10006229376.

The previous prime is 10894091669. The next prime is 10894091699. The reversal of 10894091689 is 98619049801.

It can be written as a sum of positive squares in 9 ways, for example, as 1394275600 + 9499816089 = 37340^2 + 97467^2 .

It is not a de Polignac number, because 10894091689 - 2⁹ = 10894091177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10894091669) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 26635717 + ... + 26636125.

It is an arithmetic number, because the mean of its divisors is an integer number (658625845).

Almost surely, 2^10894091689 is an apocalyptic number.

It is an amenable number.

10894091689 is a deficient number, since it is larger than the sum of its proper divisors (961173521).

10894091689 is an frugal number, since it uses more digits than its factorization.

10894091689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229 (or 819 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 55.

The spelling of 10894091689 in words is "ten billion, eight hundred ninety-four million, ninety-one thousand, six hundred eighty-nine".