13178329978572 has 72 divisors (see below), whose sum is σ = 36355431949200. Its totient is φ = 3991764241920.

The previous prime is 13178329978549. The next prime is 13178329978591. The reversal of 13178329978572 is 27587992387131.

It is a happy number.

13178329978572 is a `hidden beast` number, since 1 + 3 + 1 + 78 + 329 + 97 + 85 + 72 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 13178329978572.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6005697 + ... + 7900952.

It is an arithmetic number, because the mean of its divisors is an integer number (504936554850).

Almost surely, 2^{13178329978572} is an apocalyptic number.

13178329978572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13178329978572 is an abundant number, since it is smaller than the sum of its proper divisors (23177101970628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13178329978572 is a wasteful number, since it uses less digits than its factorization.

13178329978572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13909063 (or 13909058 counting only the distinct ones).

The product of its digits is 320060160, while the sum is 72.

The spelling of 13178329978572 in words is "thirteen trillion, one hundred seventy-eight billion, three hundred twenty-nine million, nine hundred seventy-eight thousand, five hundred seventy-two".