36443561561 has 8 divisors (see below), whose sum is σ = 39759747264. Its totient is φ = 33127898320.

The previous prime is 36443561549. The next prime is 36443561563. The reversal of 36443561561 is 16516534463.

36443561561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 36443561561 - 2²² = 36439367257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (36443561563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23111 + ... + 270963.

It is an arithmetic number, because the mean of its divisors is an integer number (4969968408).

Almost surely, 2^36443561561 is an apocalyptic number.

It is an amenable number.

36443561561 is a deficient number, since it is larger than the sum of its proper divisors (3316185703).

36443561561 is a wasteful number, since it uses less digits than its factorization.

36443561561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261231.

The product of its digits is 777600, while the sum is 44.

The spelling of 36443561561 in words is "thirty-six billion, four hundred forty-three million, five hundred sixty-one thousand, five hundred sixty-one".