12667649832 has 96 divisors (see below), whose sum is σ = 36784675200. Its totient is φ = 4038924384.

The previous prime is 12667649779. The next prime is 12667649837. The reversal of 12667649832 is 23894676621.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (12667649837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58833 + ... + 169695.

It is an arithmetic number, because the mean of its divisors is an integer number (383173700).

Almost surely, 2^12667649832 is an apocalyptic number.

12667649832 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12667649832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18392337600).

12667649832 is an abundant number, since it is smaller than the sum of its proper divisors (24117025368).

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

12667649832 is a wasteful number, since it uses less digits than its factorization.

12667649832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110924 (or 110891 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 54.

The spelling of 12667649832 in words is "twelve billion, six hundred sixty-seven million, six hundred forty-nine thousand, eight hundred thirty-two".