12016612728 has 24 divisors (see below), whose sum is σ = 32544993000. Its totient is φ = 4005537552.

The previous prime is 12016612703. The next prime is 12016612733. The reversal of 12016612728 is 82721661021.

12016612728 is a `hidden beast` number, since 1 + 2 + 0 + 16 + 612 + 7 + 28 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

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

It is a junction number, because it is equal to n+sod(n) for n = 12016612692 and 12016612701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 83448628 + ... + 83448771.

It is an arithmetic number, because the mean of its divisors is an integer number (1356041375).

Almost surely, 2^12016612728 is an apocalyptic number.

12016612728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12016612728 is an abundant number, since it is smaller than the sum of its proper divisors (20528380272).

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

12016612728 is a wasteful number, since it uses less digits than its factorization.

12016612728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166897411 (or 166897404 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The spelling of 12016612728 in words is "twelve billion, sixteen million, six hundred twelve thousand, seven hundred twenty-eight".