13878433792129 has 9 divisors (see below), whose sum is σ = 13897462975713. Its totient is φ = 13859430644052.

The previous prime is 13878433792121. The next prime is 13878433792163. The reversal of 13878433792129 is 92129733487831.

The square root of 13878433792129 is 3725377.

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

It is not a de Polignac number, because 13878433792129 - 2³ = 13878433792121 is a prime.

It is a super-2 number, since 2×13878433792129² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13878433792121) 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, 3289505782 + ... + 3289510000.

It is an arithmetic number, because the mean of its divisors is an integer number (1544162552857).

Almost surely, 2^{13878433792129} is an apocalyptic number.

13878433792129 is the 3725377-th square number.

13878433792129 is the 1862689-th centered octagonal number.

It is an amenable number.

13878433792129 is a deficient number, since it is larger than the sum of its proper divisors (19029183584).

13878433792129 is an frugal number, since it uses more digits than its factorization.

13878433792129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10204 (or 5102 counting only the distinct ones).

The product of its digits is 109734912, while the sum is 67.

The spelling of 13878433792129 in words is "thirteen trillion, eight hundred seventy-eight billion, four hundred thirty-three million, seven hundred ninety-two thousand, one hundred twenty-nine".