12632911281 has 16 divisors (see below), whose sum is σ = 18729580800. Its totient is φ = 8415570384.

The previous prime is 12632911261. The next prime is 12632911331. The reversal of 12632911281 is 18211923621.

12632911281 is a `hidden beast` number, since 1 + 2 + 632 + 9 + 1 + 12 + 8 + 1 = 666.

It is not a de Polignac number, because 12632911281 - 2¹³ = 12632903089 is a prime.

It is a super-2 number, since 2×12632911281² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12632911261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140466 + ... + 212123.

It is an arithmetic number, because the mean of its divisors is an integer number (1170598800).

Almost surely, 2^12632911281 is an apocalyptic number.

It is an amenable number.

12632911281 is a deficient number, since it is larger than the sum of its proper divisors (6096669519).

12632911281 is a wasteful number, since it uses less digits than its factorization.

12632911281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353925 (or 353919 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The spelling of 12632911281 in words is "twelve billion, six hundred thirty-two million, nine hundred eleven thousand, two hundred eighty-one".