36803518781 has 2 divisors, whose sum is σ = 36803518782. Its totient is φ = 36803518780.

The previous prime is 36803518699. The next prime is 36803518799. The reversal of 36803518781 is 18781530863.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28572493156 + 8231025625 = 169034^2 + 90725^2 .

It is a cyclic number.

It is not a de Polignac number, because 36803518781 - 2¹⁰ = 36803517757 is a prime.

It is a super-2 number, since 2×36803518781² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36803511781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18401759390 + 18401759391.

It is an arithmetic number, because the mean of its divisors is an integer number (18401759391).

Almost surely, 2^36803518781 is an apocalyptic number.

It is an amenable number.

36803518781 is a deficient number, since it is larger than the sum of its proper divisors (1).

36803518781 is an equidigital number, since it uses as much as digits as its factorization.

36803518781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 36803518781 in words is "thirty-six billion, eight hundred three million, five hundred eighteen thousand, seven hundred eighty-one".