10691489899 has 4 divisors (see below), whose sum is σ = 10706963080. Its totient is φ = 10676016720.

The previous prime is 10691489881. The next prime is 10691489903. The reversal of 10691489899 is 99898419601.

10691489899 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99898419601 = 16183 ⋅6173047.

It is a cyclic number.

It is not a de Polignac number, because 10691489899 - 2¹⁷ = 10691358827 is a prime.

It is a super-2 number, since 2×10691489899² (a number of 21 digits) contains 22 as substring.

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 10691489899.

It is not an unprimeable number, because it can be changed into a prime (10691483899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7735554 + ... + 7736935.

It is an arithmetic number, because the mean of its divisors is an integer number (2676740770).

Almost surely, 2^10691489899 is an apocalyptic number.

10691489899 is a deficient number, since it is larger than the sum of its proper divisors (15473181).

10691489899 is an equidigital number, since it uses as much as digits as its factorization.

10691489899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15473180.

The product of its (nonzero) digits is 10077696, while the sum is 64.

The spelling of 10691489899 in words is "ten billion, six hundred ninety-one million, four hundred eighty-nine thousand, eight hundred ninety-nine".