13398220688164 has 81 divisors (see below), whose sum is σ = 26545442999859. Its totient is φ = 5913967213440.

The previous prime is 13398220688143. The next prime is 13398220688183. The reversal of 13398220688164 is 46188602289331.

The square root of 13398220688164 is 3660358.

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

It can be written as a sum of positive squares in 4 ways, for example, as 7307236176100 + 6090984512064 = 2703190^2 + 2467992^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2188891024 + ... + 2188897144.

Almost surely, 2^{13398220688164} is an apocalyptic number.

13398220688164 is the 3660358-th square number.

It is an amenable number.

13398220688164 is a deficient number, since it is larger than the sum of its proper divisors (13147222311695).

13398220688164 is an frugal number, since it uses more digits than its factorization.

13398220688164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12318 (or 6159 counting only the distinct ones).

The product of its (nonzero) digits is 23887872, while the sum is 61.

The spelling of 13398220688164 in words is "thirteen trillion, three hundred ninety-eight billion, two hundred twenty million, six hundred eighty-eight thousand, one hundred sixty-four".