12146481509 has 2 divisors, whose sum is σ = 12146481510.
Its totient is φ = 12146481508.
The previous prime is 12146481497. The next prime is 12146481511. The reversal of 12146481509 is 90518464121.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 11995068484 + 151413025 = 109522^2 + 12305^2
It is a cyclic number.
It is not a de Polignac number, because 12146481509 - 216 = 12146415973 is a prime.
Together with 12146481511, it forms a pair of twin primes.
It is a Chen prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (12146481559) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6073240754 + 6073240755.
It is an arithmetic number, because the mean of its divisors is an integer number (6073240755).
Almost surely, 212146481509 is an apocalyptic number.
It is an amenable number.
12146481509 is a deficient number, since it is larger than the sum of its proper divisors (1).
12146481509 is an equidigital number, since it uses as much as digits as its factorization.
12146481509 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 69120, while the sum is 41.
The spelling of 12146481509 in words is "twelve billion, one hundred forty-six million, four hundred eighty-one thousand, five hundred nine".