36556865 has 4 divisors (see below), whose sum is σ = 43868244. Its totient is φ = 29245488.

The previous prime is 36556859. The next prime is 36556903. The reversal of 36556865 is 56865563.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56865563 = 31 ⋅1834373.

It can be written as a sum of positive squares in 2 ways, for example, as 21864976 + 14691889 = 4676^2 + 3833^2 .

It is a cyclic number.

It is not a de Polignac number, because 36556865 - 2⁸ = 36556609 is a prime.

It is a Duffinian number.

It is a Curzon 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, 3655682 + ... + 3655691.

It is an arithmetic number, because the mean of its divisors is an integer number (10967061).

Almost surely, 2^36556865 is an apocalyptic number.

It is an amenable number.

36556865 is a deficient number, since it is larger than the sum of its proper divisors (7311379).

36556865 is an equidigital number, since it uses as much as digits as its factorization.

36556865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7311378.

The product of its digits is 648000, while the sum is 44.

The square root of 36556865 is about 6046.2273361163. The cubic root of 36556865 is about 331.8865467330.

The spelling of 36556865 in words is "thirty-six million, five hundred fifty-six thousand, eight hundred sixty-five".