11358220865 has 4 divisors (see below), whose sum is σ = 13629865044. Its totient is φ = 9086576688.

The previous prime is 11358220859. The next prime is 11358220889. The reversal of 11358220865 is 56802285311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56802285311 = 389 ⋅146021299.

It can be written as a sum of positive squares in 2 ways, for example, as 1390394944 + 9967825921 = 37288^2 + 99839^2 .

It is a cyclic number.

It is not a de Polignac number, because 11358220865 - 2⁸ = 11358220609 is a prime.

It is a super-3 number, since 3×11358220865³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1135822082 + ... + 1135822091.

It is an arithmetic number, because the mean of its divisors is an integer number (3407466261).

Almost surely, 2^11358220865 is an apocalyptic number.

It is an amenable number.

11358220865 is a deficient number, since it is larger than the sum of its proper divisors (2271644179).

11358220865 is an equidigital number, since it uses as much as digits as its factorization.

11358220865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2271644178.

The product of its (nonzero) digits is 115200, while the sum is 41.

The spelling of 11358220865 in words is "eleven billion, three hundred fifty-eight million, two hundred twenty thousand, eight hundred sixty-five".