64650533 has 2 divisors, whose sum is σ = 64650534. Its totient is φ = 64650532.

The previous prime is 64650517. The next prime is 64650569. The reversal of 64650533 is 33505646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46689889 + 17960644 = 6833^2 + 4238^2 .

It is a cyclic number.

It is not a de Polignac number, because 64650533 - 2⁴ = 64650517 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64650533.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64680533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32325266 + 32325267.

It is an arithmetic number, because the mean of its divisors is an integer number (32325267).

Almost surely, 2^64650533 is an apocalyptic number.

It is an amenable number.

64650533 is a deficient number, since it is larger than the sum of its proper divisors (1).

64650533 is an equidigital number, since it uses as much as digits as its factorization.

64650533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 32.

The square root of 64650533 is about 8040.5555156345. Note that the first 4 decimals coincide. The cubic root of 64650533 is about 401.3507108996.

The spelling of 64650533 in words is "sixty-four million, six hundred fifty thousand, five hundred thirty-three".