12418646553 has 6 divisors (see below), whose sum is σ = 17938045034. Its totient is φ = 8279097696.

The previous prime is 12418646507. The next prime is 12418646561. The reversal of 12418646553 is 35564681421.

12418646553 is a `hidden beast` number, since 1 + 2 + 4 + 186 + 465 + 5 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11177352729 + 1241293824 = 105723^2 + 35232^2 .

It is not a de Polignac number, because 12418646553 - 2¹⁶ = 12418581017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12418646499 and 12418646508.

It is not an unprimeable number, because it can be changed into a prime (12418626553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 689924800 + ... + 689924817.

Almost surely, 2^12418646553 is an apocalyptic number.

It is an amenable number.

12418646553 is a deficient number, since it is larger than the sum of its proper divisors (5519398481).

12418646553 is a wasteful number, since it uses less digits than its factorization.

12418646553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379849623 (or 1379849620 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The spelling of 12418646553 in words is "twelve billion, four hundred eighteen million, six hundred forty-six thousand, five hundred fifty-three".