12509487193 has 12 divisors (see below), whose sum is σ = 14561991552. Its totient is φ = 10714946760.

The previous prime is 12509487113. The next prime is 12509487223. The reversal of 12509487193 is 39178490521.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-12509487193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12509487103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17313 + ... + 159118.

It is an arithmetic number, because the mean of its divisors is an integer number (1213499296).

Almost surely, 2^12509487193 is an apocalyptic number.

It is an amenable number.

12509487193 is a deficient number, since it is larger than the sum of its proper divisors (2052504359).

12509487193 is a wasteful number, since it uses less digits than its factorization.

12509487193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177892 (or 177885 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 49.

The spelling of 12509487193 in words is "twelve billion, five hundred nine million, four hundred eighty-seven thousand, one hundred ninety-three".