3636700784081 has 2 divisors, whose sum is σ = 3636700784082. Its totient is φ = 3636700784080.

The previous prime is 3636700784053. The next prime is 3636700784111. The reversal of 3636700784081 is 1804870076363.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2999162412481 + 637538371600 = 1731809^2 + 798460^2 .

It is a cyclic number.

It is not a de Polignac number, because 3636700784081 - 2²⁶ = 3636633675217 is a prime.

It is a super-2 number, since 2×3636700784081² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3636700784021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1818350392040 + 1818350392041.

It is an arithmetic number, because the mean of its divisors is an integer number (1818350392041).

Almost surely, 2^{3636700784081} is an apocalyptic number.

It is an amenable number.

3636700784081 is a deficient number, since it is larger than the sum of its proper divisors (1).

3636700784081 is an equidigital number, since it uses as much as digits as its factorization.

3636700784081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4064256, while the sum is 53.

The spelling of 3636700784081 in words is "three trillion, six hundred thirty-six billion, seven hundred million, seven hundred eighty-four thousand, eighty-one".