36816504364721 has 2 divisors, whose sum is σ = 36816504364722. Its totient is φ = 36816504364720.

The previous prime is 36816504364711. The next prime is 36816504364751. The reversal of 36816504364721 is 12746340561863.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36136268709025 + 680235655696 = 6011345^2 + 824764^2 .

It is a cyclic number.

It is not a de Polignac number, because 36816504364721 - 2⁶ = 36816504364657 is a prime.

It is not a weakly prime, because it can be changed into another prime (36816504364711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18408252182360 + 18408252182361.

It is an arithmetic number, because the mean of its divisors is an integer number (18408252182361).

Almost surely, 2^{36816504364721} is an apocalyptic number.

It is an amenable number.

36816504364721 is a deficient number, since it is larger than the sum of its proper divisors (1).

36816504364721 is an equidigital number, since it uses as much as digits as its factorization.

36816504364721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17418240, while the sum is 56.

The spelling of 36816504364721 in words is "thirty-six trillion, eight hundred sixteen billion, five hundred four million, three hundred sixty-four thousand, seven hundred twenty-one".