11605511272 has 8 divisors (see below), whose sum is σ = 21760333650. Its totient is φ = 5802755632.

The previous prime is 11605511231. The next prime is 11605511297. The reversal of 11605511272 is 27211550611.

11605511272 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6602212516 + 5003298756 = 81254^2 + 70734^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 725344447 + ... + 725344462.

Almost surely, 2^11605511272 is an apocalyptic number.

It is an amenable number.

11605511272 is a deficient number, since it is larger than the sum of its proper divisors (10154822378).

11605511272 is a wasteful number, since it uses less digits than its factorization.

11605511272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1450688915 (or 1450688911 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 31.

The spelling of 11605511272 in words is "eleven billion, six hundred five million, five hundred eleven thousand, two hundred seventy-two".