36505731481 has 2 divisors, whose sum is σ = 36505731482. Its totient is φ = 36505731480.

The previous prime is 36505731359. The next prime is 36505731499. The reversal of 36505731481 is 18413750563.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36487112256 + 18619225 = 191016^2 + 4315^2 .

It is a cyclic number.

It is not a de Polignac number, because 36505731481 - 2⁹ = 36505730969 is a prime.

It is a super-2 number, since 2×36505731481² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (36505731181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18252865740 + 18252865741.

It is an arithmetic number, because the mean of its divisors is an integer number (18252865741).

Almost surely, 2^36505731481 is an apocalyptic number.

It is an amenable number.

36505731481 is a deficient number, since it is larger than the sum of its proper divisors (1).

36505731481 is an equidigital number, since it uses as much as digits as its factorization.

36505731481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 36505731481 in words is "thirty-six billion, five hundred five million, seven hundred thirty-one thousand, four hundred eighty-one".