12609494856 has 160 divisors (see below), whose sum is σ = 42488424000. Its totient is φ = 3413073024.

The previous prime is 12609494827. The next prime is 12609494857. The reversal of 12609494856 is 65849490621.

12609494856 is a `hidden beast` number, since 12 + 60 + 9 + 494 + 85 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (12609494857) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 13030 + ... + 159338.

It is an arithmetic number, because the mean of its divisors is an integer number (265552650).

Almost surely, 2^12609494856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12609494856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21244212000).

12609494856 is an abundant number, since it is smaller than the sum of its proper divisors (29878929144).

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

12609494856 is a wasteful number, since it uses less digits than its factorization.

12609494856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146353 (or 146340 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 12609494856 in words is "twelve billion, six hundred nine million, four hundred ninety-four thousand, eight hundred fifty-six".