13072949569 has 9 divisors (see below), whose sum is σ = 13389077313. Its totient is φ = 12764125332.

The previous prime is 13072949567. The next prime is 13072949579. The reversal of 13072949569 is 96594927031.

It is a happy number.

The square root of 13072949569 is 114337.

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

It is not a de Polignac number, because 13072949569 - 2¹ = 13072949567 is a prime.

It is a super-2 number, since 2×13072949569² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13072949567) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4915162 + ... + 4917820.

It is an arithmetic number, because the mean of its divisors is an integer number (1487675257).

Almost surely, 2^13072949569 is an apocalyptic number.

13072949569 is the 114337-th square number.

13072949569 is the 57169-th centered octagonal number.

It is an amenable number.

13072949569 is a deficient number, since it is larger than the sum of its proper divisors (316127744).

13072949569 is an frugal number, since it uses more digits than its factorization.

13072949569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5404 (or 2702 counting only the distinct ones).

The product of its (nonzero) digits is 3674160, while the sum is 55.

The spelling of 13072949569 in words is "thirteen billion, seventy-two million, nine hundred forty-nine thousand, five hundred sixty-nine".