36648813857 has 2 divisors, whose sum is σ = 36648813858. Its totient is φ = 36648813856.

The previous prime is 36648813833. The next prime is 36648813863. The reversal of 36648813857 is 75831884663.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18383021056 + 18265792801 = 135584^2 + 135151^2 .

It is an emirp because it is prime and its reverse (75831884663) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36648813857 - 2⁶ = 36648813793 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 36648813796 and 36648813805.

It is not a weakly prime, because it can be changed into another prime (36648813827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18324406928 + 18324406929.

It is an arithmetic number, because the mean of its divisors is an integer number (18324406929).

Almost surely, 2^36648813857 is an apocalyptic number.

It is an amenable number.

36648813857 is a deficient number, since it is larger than the sum of its proper divisors (1).

36648813857 is an equidigital number, since it uses as much as digits as its factorization.

36648813857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23224320, while the sum is 59.

The spelling of 36648813857 in words is "thirty-six billion, six hundred forty-eight million, eight hundred thirteen thousand, eight hundred fifty-seven".