64511136533 has 2 divisors, whose sum is σ = 64511136534. Its totient is φ = 64511136532.

The previous prime is 64511136523. The next prime is 64511136581. The reversal of 64511136533 is 33563111546.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63613415089 + 897721444 = 252217^2 + 29962^2 .

It is a cyclic number.

It is not a de Polignac number, because 64511136533 - 2⁴ = 64511136517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64511136523) 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, 32255568266 + 32255568267.

It is an arithmetic number, because the mean of its divisors is an integer number (32255568267).

Almost surely, 2^64511136533 is an apocalyptic number.

It is an amenable number.

64511136533 is a deficient number, since it is larger than the sum of its proper divisors (1).

64511136533 is an equidigital number, since it uses as much as digits as its factorization.

64511136533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 97200, while the sum is 38.

The spelling of 64511136533 in words is "sixty-four billion, five hundred eleven million, one hundred thirty-six thousand, five hundred thirty-three".