36533216521 has 2 divisors, whose sum is σ = 36533216522. Its totient is φ = 36533216520.

The previous prime is 36533216479. The next prime is 36533216539. The reversal of 36533216521 is 12561233563.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21314540025 + 15218676496 = 145995^2 + 123364^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36533216521 is a prime.

It is not a weakly prime, because it can be changed into another prime (36533216561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18266608260 + 18266608261.

It is an arithmetic number, because the mean of its divisors is an integer number (18266608261).

Almost surely, 2^36533216521 is an apocalyptic number.

It is an amenable number.

36533216521 is a deficient number, since it is larger than the sum of its proper divisors (1).

36533216521 is an equidigital number, since it uses as much as digits as its factorization.

36533216521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 37.

The spelling of 36533216521 in words is "thirty-six billion, five hundred thirty-three million, two hundred sixteen thousand, five hundred twenty-one".