64544025433 has 2 divisors, whose sum is σ = 64544025434. Its totient is φ = 64544025432.

The previous prime is 64544025431. The next prime is 64544025467. The reversal of 64544025433 is 33452044546.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51385182489 + 13158842944 = 226683^2 + 114712^2 .

It is a cyclic number.

It is not a de Polignac number, because 64544025433 - 2¹ = 64544025431 is a prime.

Together with 64544025431, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (64544025431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32272012716 + 32272012717.

It is an arithmetic number, because the mean of its divisors is an integer number (32272012717).

Almost surely, 2^64544025433 is an apocalyptic number.

It is an amenable number.

64544025433 is a deficient number, since it is larger than the sum of its proper divisors (1).

64544025433 is an equidigital number, since it uses as much as digits as its factorization.

64544025433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 691200, while the sum is 40.

Adding to 64544025433 its reverse (33452044546), we get a palindrome (97996069979).

The spelling of 64544025433 in words is "sixty-four billion, five hundred forty-four million, twenty-five thousand, four hundred thirty-three".