13123157109 has 8 divisors (see below), whose sum is σ = 17502790272. Its totient is φ = 8746147680.

The previous prime is 13123157059. The next prime is 13123157137. The reversal of 13123157109 is 90175132131.

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

It is not a de Polignac number, because 13123157109 - 2¹² = 13123153013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13123157109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13123157189) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 644232 + ... + 664289.

It is an arithmetic number, because the mean of its divisors is an integer number (2187848784).

Almost surely, 2^13123157109 is an apocalyptic number.

It is an amenable number.

13123157109 is a deficient number, since it is larger than the sum of its proper divisors (4379633163).

13123157109 is a wasteful number, since it uses less digits than its factorization.

13123157109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311867.

The product of its (nonzero) digits is 5670, while the sum is 33.

The spelling of 13123157109 in words is "thirteen billion, one hundred twenty-three million, one hundred fifty-seven thousand, one hundred nine".