11072156217665 has 4 divisors (see below), whose sum is σ = 13286587461204. Its totient is φ = 8857724974128.

The previous prime is 11072156217643. The next prime is 11072156217679. The reversal of 11072156217665 is 56671265127011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5159108048689 + 5913048168976 = 2271367^2 + 2431676^2 .

It is a cyclic number.

It is not a de Polignac number, because 11072156217665 - 2¹⁶ = 11072156152129 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1107215621762 + ... + 1107215621771.

It is an arithmetic number, because the mean of its divisors is an integer number (3321646865301).

Almost surely, 2^{11072156217665} is an apocalyptic number.

It is an amenable number.

11072156217665 is a deficient number, since it is larger than the sum of its proper divisors (2214431243539).

11072156217665 is an equidigital number, since it uses as much as digits as its factorization.

11072156217665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2214431243538.

The product of its (nonzero) digits is 1058400, while the sum is 50.

The spelling of 11072156217665 in words is "eleven trillion, seventy-two billion, one hundred fifty-six million, two hundred seventeen thousand, six hundred sixty-five".