13161220466553 has 48 divisors (see below), whose sum is σ = 21099407224896. Its totient is φ = 7869242465280.

The previous prime is 13161220466549. The next prime is 13161220466599. The reversal of 13161220466553 is 35566402216131.

It is a happy number.

13161220466553 is a `hidden beast` number, since 1 + 3 + 1 + 6 + 12 + 20 + 4 + 66 + 553 = 666.

It is not a de Polignac number, because 13161220466553 - 2² = 13161220466549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13161220466499 and 13161220466508.

It is not an unprimeable number, because it can be changed into a prime (13161220466503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24126475 + ... + 24665952.

It is an arithmetic number, because the mean of its divisors is an integer number (439570983852).

Almost surely, 2^{13161220466553} is an apocalyptic number.

It is an amenable number.

13161220466553 is a deficient number, since it is larger than the sum of its proper divisors (7938186758343).

13161220466553 is a wasteful number, since it uses less digits than its factorization.

13161220466553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48792534 (or 48792531 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 13161220466553 in words is "thirteen trillion, one hundred sixty-one billion, two hundred twenty million, four hundred sixty-six thousand, five hundred fifty-three".