12721812480 has 352 divisors, whose sum is σ = 48695673600. Its totient is φ = 3131080704.

The previous prime is 12721812461. The next prime is 12721812541. The reversal of 12721812480 is 8421812721.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 1793581 + ... + 1800659.

Almost surely, 2^12721812480 is an apocalyptic number.

12721812480 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 12721812480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24347836800).

12721812480 is an abundant number, since it is smaller than the sum of its proper divisors (35973861120).

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

12721812480 is a wasteful number, since it uses less digits than its factorization.

12721812480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7126 (or 7102 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The spelling of 12721812480 in words is "twelve billion, seven hundred twenty-one million, eight hundred twelve thousand, four hundred eighty".