12609956394 has 40 divisors (see below), whose sum is σ = 32292166368. Its totient is φ = 3602844360.

The previous prime is 12609956389. The next prime is 12609956413. The reversal of 12609956394 is 49365990621.

12609956394 is a `hidden beast` number, since 12 + 60 + 9 + 9 + 563 + 9 + 4 = 666.

It is a super-2 number, since 2×12609956394² (a number of 21 digits) contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12609956394.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5558812 + ... + 5561079.

Almost surely, 2^12609956394 is an apocalyptic number.

12609956394 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12609956394 is an abundant number, since it is smaller than the sum of its proper divisors (19682209974).

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

12609956394 is a wasteful number, since it uses less digits than its factorization.

12609956394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11119912 (or 11119903 counting only the distinct ones).

The product of its (nonzero) digits is 3149280, while the sum is 54.

The spelling of 12609956394 in words is "twelve billion, six hundred nine million, nine hundred fifty-six thousand, three hundred ninety-four".