36531943897 has 2 divisors, whose sum is σ = 36531943898. Its totient is φ = 36531943896.

The previous prime is 36531943879. The next prime is 36531943939. The reversal of 36531943897 is 79834913563.

Together with previous prime (36531943879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36168812761 + 363131136 = 190181^2 + 19056^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36531943897 is a prime.

It is not a weakly prime, because it can be changed into another prime (36531943837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18265971948 + 18265971949.

It is an arithmetic number, because the mean of its divisors is an integer number (18265971949).

Almost surely, 2^36531943897 is an apocalyptic number.

It is an amenable number.

36531943897 is a deficient number, since it is larger than the sum of its proper divisors (1).

36531943897 is an equidigital number, since it uses as much as digits as its factorization.

36531943897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14696640, while the sum is 58.

The spelling of 36531943897 in words is "thirty-six billion, five hundred thirty-one million, nine hundred forty-three thousand, eight hundred ninety-seven".