15243355788123 has 4 divisors (see below), whose sum is σ = 20324474384168. Its totient is φ = 10162237192080.

The previous prime is 15243355788121. The next prime is 15243355788127. The reversal of 15243355788123 is 32188755334251.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 15243355788123 - 2¹ = 15243355788121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15243355788121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2540559298018 + ... + 2540559298023.

It is an arithmetic number, because the mean of its divisors is an integer number (5081118596042).

Almost surely, 2^{15243355788123} is an apocalyptic number.

15243355788123 is a deficient number, since it is larger than the sum of its proper divisors (5081118596045).

15243355788123 is an equidigital number, since it uses as much as digits as its factorization.

15243355788123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5081118596044.

The product of its digits is 24192000, while the sum is 57.

The spelling of 15243355788123 in words is "fifteen trillion, two hundred forty-three billion, three hundred fifty-five million, seven hundred eighty-eight thousand, one hundred twenty-three".