36644061423661 has 4 divisors (see below), whose sum is σ = 36716053686300. Its totient is φ = 36572069161024.

The previous prime is 36644061423653. The next prime is 36644061423701. The reversal of 36644061423661 is 16632416044663.

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 33758075428900 + 2885985994761 = 5810170^2 + 1698819^2 .

It is a cyclic number.

It is not a de Polignac number, because 36644061423661 - 2³ = 36644061423653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 36644061423599 and 36644061423608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36644061421661) 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, 35996130556 + ... + 35996131573.

It is an arithmetic number, because the mean of its divisors is an integer number (9179013421575).

Almost surely, 2^{36644061423661} is an apocalyptic number.

It is an amenable number.

36644061423661 is a deficient number, since it is larger than the sum of its proper divisors (71992262639).

36644061423661 is an equidigital number, since it uses as much as digits as its factorization.

36644061423661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71992262638.

The product of its (nonzero) digits is 8957952, while the sum is 52.

The spelling of 36644061423661 in words is "thirty-six trillion, six hundred forty-four billion, sixty-one million, four hundred twenty-three thousand, six hundred sixty-one".