12431775621 has 8 divisors (see below), whose sum is σ = 16579637280. Its totient is φ = 8285882192.

The previous prime is 12431775553. The next prime is 12431775641. The reversal of 12431775621 is 12657713421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12431775621 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12431775621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12431775641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 477255 + ... + 502628.

It is an arithmetic number, because the mean of its divisors is an integer number (2072454660).

Almost surely, 2^12431775621 is an apocalyptic number.

It is an amenable number.

12431775621 is a deficient number, since it is larger than the sum of its proper divisors (4147861659).

12431775621 is an equidigital number, since it uses as much as digits as its factorization.

12431775621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984115.

The product of its digits is 70560, while the sum is 39.

The spelling of 12431775621 in words is "twelve billion, four hundred thirty-one million, seven hundred seventy-five thousand, six hundred twenty-one".