12571463721 has 8 divisors (see below), whose sum is σ = 17339950080. Its totient is φ = 8091976592.

The previous prime is 12571463719. The next prime is 12571463741. The reversal of 12571463721 is 12736417521.

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

It is a cyclic number.

It is not a de Polignac number, because 12571463721 - 2¹ = 12571463719 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12571463721.

It is not an unprimeable number, because it can be changed into a prime (12571463711) 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, 72249705 + ... + 72249878.

It is an arithmetic number, because the mean of its divisors is an integer number (2167493760).

Almost surely, 2^12571463721 is an apocalyptic number.

It is an amenable number.

12571463721 is a deficient number, since it is larger than the sum of its proper divisors (4768486359).

12571463721 is a wasteful number, since it uses less digits than its factorization.

12571463721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144499615.

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

The spelling of 12571463721 in words is "twelve billion, five hundred seventy-one million, four hundred sixty-three thousand, seven hundred twenty-one".