12728240081616 has 40 divisors (see below), whose sum is σ = 32882495982784. Its totient is φ = 4242590680320.

The previous prime is 12728240081603. The next prime is 12728240081671. The reversal of 12728240081616 is 61618004282721.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3552781 + ... + 6170796.

Almost surely, 2^{12728240081616} is an apocalyptic number.

12728240081616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12728240081616 is an abundant number, since it is smaller than the sum of its proper divisors (20154255901168).

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

12728240081616 is a wasteful number, since it uses less digits than its factorization.

12728240081616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9750859 (or 9750853 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 48.

The spelling of 12728240081616 in words is "twelve trillion, seven hundred twenty-eight billion, two hundred forty million, eighty-one thousand, six hundred sixteen".