1166215347533 has 4 divisors (see below), whose sum is σ = 1188219410748. Its totient is φ = 1144211284320.

The previous prime is 1166215347449. The next prime is 1166215347601. The reversal of 1166215347533 is 3357435126611.

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 975663891049 + 190551456484 = 987757^2 + 436522^2 .

It is a cyclic number.

It is not a de Polignac number, because 1166215347533 - 2²⁸ = 1165946912077 is a prime.

It is a super-4 number, since 4×1166215347533⁴ (a number of 49 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166215347733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11002031528 + ... + 11002031633.

It is an arithmetic number, because the mean of its divisors is an integer number (297054852687).

Almost surely, 2^{1166215347533} is an apocalyptic number.

It is an amenable number.

1166215347533 is a deficient number, since it is larger than the sum of its proper divisors (22004063215).

1166215347533 is an equidigital number, since it uses as much as digits as its factorization.

1166215347533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22004063214.

The product of its digits is 1360800, while the sum is 47.

The spelling of 1166215347533 in words is "one trillion, one hundred sixty-six billion, two hundred fifteen million, three hundred forty-seven thousand, five hundred thirty-three".