12517173442 has 4 divisors (see below), whose sum is σ = 18775760166. Its totient is φ = 6258586720.

The previous prime is 12517173359. The next prime is 12517173463. The reversal of 12517173442 is 24437171521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24437171521 = 7 ⋅3491024503.

It can be written as a sum of positive squares in only one way, i.e., 10059889401 + 2457284041 = 100299^2 + 49571^2 .

It is a super-2 number, since 2×12517173442² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3129293359 + ... + 3129293362.

Almost surely, 2^12517173442 is an apocalyptic number.

12517173442 is a deficient number, since it is larger than the sum of its proper divisors (6258586724).

12517173442 is an equidigital number, since it uses as much as digits as its factorization.

12517173442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6258586723.

The product of its digits is 47040, while the sum is 37.

The spelling of 12517173442 in words is "twelve billion, five hundred seventeen million, one hundred seventy-three thousand, four hundred forty-two".