10931329809 has 15 divisors (see below), whose sum is σ = 16330923147. Its totient is φ = 7286925888.

The previous prime is 10931329769. The next prime is 10931329811. The reversal of 10931329809 is 90892313901.

It is a happy number.

The square root of 10931329809 is 104553.

It is a perfect power (a square), and thus also a powerful number.

10931329809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 3761982225 + 7169347584 = 61335^2 + 84672^2 .

It is not a de Polignac number, because 10931329809 - 2¹⁹ = 10930805521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10931329819) 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 14 ways as a sum of consecutive naturals, for example, 935169 + ... + 946785.

Almost surely, 2^10931329809 is an apocalyptic number.

10931329809 is the 104553-rd square number.

10931329809 is the 52277-th centered octagonal number.

It is an amenable number.

10931329809 is a deficient number, since it is larger than the sum of its proper divisors (5399593338).

10931329809 is an frugal number, since it uses more digits than its factorization.

10931329809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23246 (or 11620 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The spelling of 10931329809 in words is "ten billion, nine hundred thirty-one million, three hundred twenty-nine thousand, eight hundred nine".