12171205477592 has 32 divisors (see below), whose sum is σ = 26092993785600. Its totient is φ = 5213863080864.

The previous prime is 12171205477553. The next prime is 12171205477597. The reversal of 12171205477592 is 29577450217121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12171205477597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49205492 + ... + 49452227.

It is an arithmetic number, because the mean of its divisors is an integer number (815406055800).

Almost surely, 2^{12171205477592} is an apocalyptic number.

It is an amenable number.

12171205477592 is an abundant number, since it is smaller than the sum of its proper divisors (13921788308008).

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

12171205477592 is a wasteful number, since it uses less digits than its factorization.

12171205477592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98659935 (or 98659931 counting only the distinct ones).

The product of its (nonzero) digits is 2469600, while the sum is 53.

The spelling of 12171205477592 in words is "twelve trillion, one hundred seventy-one billion, two hundred five million, four hundred seventy-seven thousand, five hundred ninety-two".