12356551309 has 8 divisors (see below), whose sum is σ = 12622170240. Its totient is φ = 12091045536.

The previous prime is 12356551271. The next prime is 12356551321. The reversal of 12356551309 is 90315565321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12356551309 - 2³³ = 3766616717 is a prime.

It is a super-2 number, since 2×12356551309² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12356551399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214602 + ... + 266020.

It is an arithmetic number, because the mean of its divisors is an integer number (1577771280).

Almost surely, 2^12356551309 is an apocalyptic number.

It is an amenable number.

12356551309 is a deficient number, since it is larger than the sum of its proper divisors (265618931).

12356551309 is an equidigital number, since it uses as much as digits as its factorization.

12356551309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56579.

The product of its (nonzero) digits is 121500, while the sum is 40.

The spelling of 12356551309 in words is "twelve billion, three hundred fifty-six million, five hundred fifty-one thousand, three hundred nine".