13859646529 has 3 divisors (see below), whose sum is σ = 13859764257. Its totient is φ = 13859528802.

The previous prime is 13859646527. The next prime is 13859646551. The reversal of 13859646529 is 92564695831.

The square root of 13859646529 is 117727.

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 is not a de Polignac number, because 13859646529 - 2¹ = 13859646527 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13859646527) 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, 58864 + ... + 176590.

It is an arithmetic number, because the mean of its divisors is an integer number (4619921419).

Almost surely, 2^13859646529 is an apocalyptic number.

13859646529 is the 117727-th square number.

13859646529 is the 58864-th centered octagonal number.

It is an amenable number.

13859646529 is a deficient number, since it is larger than the sum of its proper divisors (117728).

13859646529 is an frugal number, since it uses more digits than its factorization.

13859646529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235454 (or 117727 counting only the distinct ones).

The product of its digits is 13996800, while the sum is 58.

The spelling of 13859646529 in words is "thirteen billion, eight hundred fifty-nine million, six hundred forty-six thousand, five hundred twenty-nine".