12609554436 has 36 divisors (see below), whose sum is σ = 32615414832. Its totient is φ = 4105435824.

The previous prime is 12609554429. The next prime is 12609554437. The reversal of 12609554436 is 63445590621.

12609554436 is a `hidden beast` number, since 1 + 2 + 60 + 9 + 554 + 4 + 36 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 12609554391 and 12609554400.

It is not an unprimeable number, because it can be changed into a prime (12609554437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4071306 + ... + 4074401.

Almost surely, 2^12609554436 is an apocalyptic number.

It is an amenable number.

12609554436 is an abundant number, since it is smaller than the sum of its proper divisors (20005860396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12609554436 is a wasteful number, since it uses less digits than its factorization.

12609554436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8145760 (or 8145755 counting only the distinct ones).

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

The spelling of 12609554436 in words is "twelve billion, six hundred nine million, five hundred fifty-four thousand, four hundred thirty-six".