8721432457212 has 24 divisors (see below), whose sum is σ = 20353058857936. Its totient is φ = 2906708467968.

The previous prime is 8721432457211. The next prime is 8721432457217. The reversal of 8721432457212 is 2127542341278.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8721432457211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54377143 + ... + 54537294.

Almost surely, 2^{8721432457212} is an apocalyptic number.

It is an amenable number.

8721432457212 is an abundant number, since it is smaller than the sum of its proper divisors (11631626400724).

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

8721432457212 is a wasteful number, since it uses less digits than its factorization.

8721432457212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108921117 (or 108921115 counting only the distinct ones).

The product of its digits is 1505280, while the sum is 48.

The spelling of 8721432457212 in words is "eight trillion, seven hundred twenty-one billion, four hundred thirty-two million, four hundred fifty-seven thousand, two hundred twelve".