15123242509 has 8 divisors (see below), whose sum is σ = 16324940160. Its totient is φ = 13966892016.

The previous prime is 15123242507. The next prime is 15123242521. The reversal of 15123242509 is 90524232151.

15123242509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 15123242509 - 2¹ = 15123242507 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15123242501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11336097 + ... + 11337430.

It is an arithmetic number, because the mean of its divisors is an integer number (2040617520).

Almost surely, 2^15123242509 is an apocalyptic number.

It is an amenable number.

15123242509 is a deficient number, since it is larger than the sum of its proper divisors (1201697651).

15123242509 is a wasteful number, since it uses less digits than its factorization.

15123242509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22673579.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 15123242509 in words is "fifteen billion, one hundred twenty-three million, two hundred forty-two thousand, five hundred nine".