36530680721 has 2 divisors, whose sum is σ = 36530680722. Its totient is φ = 36530680720.

The previous prime is 36530680699. The next prime is 36530680727. The reversal of 36530680721 is 12708603563.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20589093121 + 15941587600 = 143489^2 + 126260^2 .

It is a cyclic number.

It is not a de Polignac number, because 36530680721 - 2¹⁰ = 36530679697 is a prime.

It is not a weakly prime, because it can be changed into another prime (36530680727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18265340360 + 18265340361.

It is an arithmetic number, because the mean of its divisors is an integer number (18265340361).

Almost surely, 2^36530680721 is an apocalyptic number.

It is an amenable number.

36530680721 is a deficient number, since it is larger than the sum of its proper divisors (1).

36530680721 is an equidigital number, since it uses as much as digits as its factorization.

36530680721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 36530680721 in words is "thirty-six billion, five hundred thirty million, six hundred eighty thousand, seven hundred twenty-one".