16481813553 has 16 divisors (see below), whose sum is σ = 24443822400. Its totient is φ = 10976031360.

The previous prime is 16481813507. The next prime is 16481813567. The reversal of 16481813553 is 35531818461.

16481813553 is a `hidden beast` number, since 1 + 6 + 4 + 81 + 8 + 13 + 553 = 666.

It is not a de Polignac number, because 16481813553 - 2¹² = 16481809457 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16481813499 and 16481813508.

It is not an unprimeable number, because it can be changed into a prime (16481813753) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 303463 + ... + 353628.

It is an arithmetic number, because the mean of its divisors is an integer number (1527738900).

Almost surely, 2^16481813553 is an apocalyptic number.

It is an amenable number.

16481813553 is a deficient number, since it is larger than the sum of its proper divisors (7962008847).

16481813553 is an equidigital number, since it uses as much as digits as its factorization.

16481813553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658029 (or 658023 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The spelling of 16481813553 in words is "sixteen billion, four hundred eighty-one million, eight hundred thirteen thousand, five hundred fifty-three".