12509734913 has 8 divisors (see below), whose sum is σ = 13518005928. Its totient is φ = 11508033024.

The previous prime is 12509734859. The next prime is 12509734921. The reversal of 12509734913 is 31943790521.

It can be written as a sum of positive squares in 4 ways, for example, as 1318633969 + 11191100944 = 36313^2 + 105788^2 .

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 12509734913 - 2¹⁰ = 12509733889 is a prime.

It is a super-2 number, since 2×12509734913² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12509734933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1638320 + ... + 1645937.

It is an arithmetic number, because the mean of its divisors is an integer number (1689750741).

Almost surely, 2^12509734913 is an apocalyptic number.

12509734913 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12509734913 is a deficient number, since it is larger than the sum of its proper divisors (1008271015).

12509734913 is a wasteful number, since it uses less digits than its factorization.

12509734913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3284563.

The product of its (nonzero) digits is 204120, while the sum is 44.

The spelling of 12509734913 in words is "twelve billion, five hundred nine million, seven hundred thirty-four thousand, nine hundred thirteen".