12173130540 has 72 divisors (see below), whose sum is σ = 37392613440. Its totient is φ = 3205073664.

The previous prime is 12173130533. The next prime is 12173130559. The reversal of 12173130540 is 4503137121.

12173130540 is a `hidden beast` number, since 1 + 21 + 73 + 1 + 30 + 540 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 413809 + ... + 442248.

Almost surely, 2^12173130540 is an apocalyptic number.

12173130540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12173130540 is an abundant number, since it is smaller than the sum of its proper divisors (25219482900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12173130540 is a wasteful number, since it uses less digits than its factorization.

12173130540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856151 (or 856146 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

Adding to 12173130540 its reverse (4503137121), we get a palindrome (16676267661).

The spelling of 12173130540 in words is "twelve billion, one hundred seventy-three million, one hundred thirty thousand, five hundred forty".