12172603519 has 4 divisors (see below), whose sum is σ = 12205771744. Its totient is φ = 12139435296.

The previous prime is 12172603511. The next prime is 12172603523. The reversal of 12172603519 is 91530627121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12172603519 - 2³ = 12172603511 is a prime.

It is a super-2 number, since 2×12172603519² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12172603511) 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 3 ways as a sum of consecutive naturals, for example, 16583562 + ... + 16584295.

It is an arithmetic number, because the mean of its divisors is an integer number (3051442936).

Almost surely, 2^12172603519 is an apocalyptic number.

12172603519 is a deficient number, since it is larger than the sum of its proper divisors (33168225).

12172603519 is an equidigital number, since it uses as much as digits as its factorization.

12172603519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33168224.

The product of its (nonzero) digits is 22680, while the sum is 37.

The spelling of 12172603519 in words is "twelve billion, one hundred seventy-two million, six hundred three thousand, five hundred nineteen".