13378128555626 has 4 divisors (see below), whose sum is σ = 20067192833442. Its totient is φ = 6689064277812.

The previous prime is 13378128555607. The next prime is 13378128555629. The reversal of 13378128555626 is 62655582187331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10017231330001 + 3360897225625 = 3165001^2 + 1833275^2 .

It is not an unprimeable number, because it can be changed into a prime (13378128555629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3344532138905 + ... + 3344532138908.

Almost surely, 2^{13378128555626} is an apocalyptic number.

13378128555626 is a deficient number, since it is larger than the sum of its proper divisors (6689064277816).

13378128555626 is an equidigital number, since it uses as much as digits as its factorization.

13378128555626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6689064277815.

The product of its digits is 72576000, while the sum is 62.

The spelling of 13378128555626 in words is "thirteen trillion, three hundred seventy-eight billion, one hundred twenty-eight million, five hundred fifty-five thousand, six hundred twenty-six".