36644430673 has 2 divisors, whose sum is σ = 36644430674. Its totient is φ = 36644430672.

The previous prime is 36644430601. The next prime is 36644430677. The reversal of 36644430673 is 37603444663.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19385828289 + 17258602384 = 139233^2 + 131372^2 .

It is a cyclic number.

It is not a de Polignac number, because 36644430673 - 2³³ = 28054496081 is a prime.

It is not a weakly prime, because it can be changed into another prime (36644430677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18322215336 + 18322215337.

It is an arithmetic number, because the mean of its divisors is an integer number (18322215337).

Almost surely, 2^36644430673 is an apocalyptic number.

It is an amenable number.

36644430673 is a deficient number, since it is larger than the sum of its proper divisors (1).

36644430673 is an equidigital number, since it uses as much as digits as its factorization.

36644430673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2612736, while the sum is 46.

The spelling of 36644430673 in words is "thirty-six billion, six hundred forty-four million, four hundred thirty thousand, six hundred seventy-three".