36553282561 has 4 divisors (see below), whose sum is σ = 36642655300. Its totient is φ = 36463909824.

The previous prime is 36553282543. The next prime is 36553282643. The reversal of 36553282561 is 16528235563.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16528235563 = 7 ⋅2361176509.

It can be written as a sum of positive squares in 2 ways, for example, as 21281266161 + 15272016400 = 145881^2 + 123580^2 .

It is a cyclic number.

It is not a de Polignac number, because 36553282561 - 2⁵ = 36553282529 is a prime.

It is a super-2 number, since 2×36553282561² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36553282501) 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, 44685756 + ... + 44686573.

It is an arithmetic number, because the mean of its divisors is an integer number (9160663825).

Almost surely, 2^36553282561 is an apocalyptic number.

It is an amenable number.

36553282561 is a deficient number, since it is larger than the sum of its proper divisors (89372739).

36553282561 is an equidigital number, since it uses as much as digits as its factorization.

36553282561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89372738.

The product of its digits is 1296000, while the sum is 46.

The spelling of 36553282561 in words is "thirty-six billion, five hundred fifty-three million, two hundred eighty-two thousand, five hundred sixty-one".