13169169049 has 3 divisors (see below), whose sum is σ = 13169283807. Its totient is φ = 13169054292.

The previous prime is 13169169023. The next prime is 13169169053. The reversal of 13169169049 is 94096196131.

The square root of 13169169049 is 114757.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 7879225225 + 5289943824 = 88765^2 + 72732^2 .

It is not a de Polignac number, because 13169169049 - 2⁷ = 13169168921 is a prime.

It is a super-2 number, since 2×13169169049² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13169168993 and 13169169011.

It is not an unprimeable number, because it can be changed into a prime (13169169449) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 57379 + ... + 172135.

It is an arithmetic number, because the mean of its divisors is an integer number (4389761269).

Almost surely, 2^13169169049 is an apocalyptic number.

13169169049 is the 114757-th square number.

13169169049 is the 57379-th centered octagonal number.

It is an amenable number.

13169169049 is a deficient number, since it is larger than the sum of its proper divisors (114758).

13169169049 is an frugal number, since it uses more digits than its factorization.

13169169049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229514 (or 114757 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 49.

Multiplying 13169169049 by its sum of digits (49), we get a square (645289283401 = 803299²).

The spelling of 13169169049 in words is "thirteen billion, one hundred sixty-nine million, one hundred sixty-nine thousand, forty-nine".