12721049480 has 128 divisors (see below), whose sum is σ = 31155062400. Its totient is φ = 4658798592.

The previous prime is 12721049449. The next prime is 12721049503. The reversal of 12721049480 is 8494012721.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3167954 + ... + 3171966.

It is an arithmetic number, because the mean of its divisors is an integer number (243398925).

Almost surely, 2^12721049480 is an apocalyptic number.

12721049480 is a gapful number since it is divisible by the number (10) 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 12721049480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15577531200).

12721049480 is an abundant number, since it is smaller than the sum of its proper divisors (18434012920).

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

12721049480 is a wasteful number, since it uses less digits than its factorization.

12721049480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4183 (or 4179 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The spelling of 12721049480 in words is "twelve billion, seven hundred twenty-one million, forty-nine thousand, four hundred eighty".