12917281632 has 96 divisors (see below), whose sum is σ = 37792137600. Its totient is φ = 3839182848.

The previous prime is 12917281631. The next prime is 12917281667. The reversal of 12917281632 is 23618271921.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12917281631) 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, 177282 + ... + 239297.

It is an arithmetic number, because the mean of its divisors is an integer number (393668100).

Almost surely, 2^12917281632 is an apocalyptic number.

12917281632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12917281632 is an abundant number, since it is smaller than the sum of its proper divisors (24874855968).

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

12917281632 is a wasteful number, since it uses less digits than its factorization.

12917281632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416628 (or 416620 counting only the distinct ones).

The product of its digits is 72576, while the sum is 42.

The spelling of 12917281632 in words is "twelve billion, nine hundred seventeen million, two hundred eighty-one thousand, six hundred thirty-two".