36644430677 has 2 divisors, whose sum is σ = 36644430678. Its totient is φ = 36644430676.

The previous prime is 36644430673. The next prime is 36644430689. The reversal of 36644430677 is 77603444663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24448762321 + 12195668356 = 156361^2 + 110434^2 .

It is a cyclic number.

It is not a de Polignac number, because 36644430677 - 2² = 36644430673 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36644430673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18322215338 + 18322215339.

It is an arithmetic number, because the mean of its divisors is an integer number (18322215339).

Almost surely, 2^36644430677 is an apocalyptic number.

It is an amenable number.

36644430677 is a deficient number, since it is larger than the sum of its proper divisors (1).

36644430677 is an equidigital number, since it uses as much as digits as its factorization.

36644430677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6096384, while the sum is 50.

The spelling of 36644430677 in words is "thirty-six billion, six hundred forty-four million, four hundred thirty thousand, six hundred seventy-seven".