64200641 has 2 divisors, whose sum is σ = 64200642. Its totient is φ = 64200640.

The previous prime is 64200599. The next prime is 64200691. The reversal of 64200641 is 14600246.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50481025 + 13719616 = 7105^2 + 3704^2 .

It is a cyclic number.

It is not a de Polignac number, because 64200641 - 2¹⁴ = 64184257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (64200691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32100320 + 32100321.

It is an arithmetic number, because the mean of its divisors is an integer number (32100321).

Almost surely, 2^64200641 is an apocalyptic number.

It is an amenable number.

64200641 is a deficient number, since it is larger than the sum of its proper divisors (1).

64200641 is an equidigital number, since it uses as much as digits as its factorization.

64200641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 64200641 is about 8012.5302495529. The cubic root of 64200641 is about 400.4175660282.

Adding to 64200641 its reverse (14600246), we get a palindrome (78800887).

The spelling of 64200641 in words is "sixty-four million, two hundred thousand, six hundred forty-one".