12990549456 has 120 divisors (see below), whose sum is σ = 38534408640. Its totient is φ = 4071195648.

The previous prime is 12990549437. The next prime is 12990549461. The reversal of 12990549456 is 65494509921.

12990549456 is a `hidden beast` number, since 1 + 2 + 9 + 90 + 549 + 4 + 5 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2991735 + ... + 2996073.

It is an arithmetic number, because the mean of its divisors is an integer number (321120072).

Almost surely, 2^12990549456 is an apocalyptic number.

12990549456 is a gapful number since it is divisible by the number (16) 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 12990549456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19267204320).

12990549456 is an abundant number, since it is smaller than the sum of its proper divisors (25543859184).

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

12990549456 is a wasteful number, since it uses less digits than its factorization.

12990549456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5593 (or 5584 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 54.

The spelling of 12990549456 in words is "twelve billion, nine hundred ninety million, five hundred forty-nine thousand, four hundred fifty-six".