11726728403072 has 16 divisors (see below), whose sum is σ = 23361841740750. Its totient is φ = 5863364201472.

The previous prime is 11726728403063. The next prime is 11726728403099. The reversal of 11726728403072 is 27030482762711.

It can be written as a sum of positive squares in only one way, i.e., 11721420406336 + 5307996736 = 3423656^2 + 72856^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a self number, because there is not a number n which added to its sum of digits gives 11726728403072.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45807532697 + ... + 45807532952.

Almost surely, 2^{11726728403072} is an apocalyptic number.

It is an amenable number.

11726728403072 is a deficient number, since it is larger than the sum of its proper divisors (11635113337678).

11726728403072 is an frugal number, since it uses more digits than its factorization.

11726728403072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91615065663 (or 91615065651 counting only the distinct ones).

The product of its (nonzero) digits is 1580544, while the sum is 50.

The spelling of 11726728403072 in words is "eleven trillion, seven hundred twenty-six billion, seven hundred twenty-eight million, four hundred three thousand, seventy-two".