64216849 has 2 divisors, whose sum is σ = 64216850. Its totient is φ = 64216848.

The previous prime is 64216829. The next prime is 64216853. The reversal of 64216849 is 94861246.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57866449 + 6350400 = 7607^2 + 2520^2 .

It is a cyclic number.

It is not a de Polignac number, because 64216849 - 2²¹ = 62119697 is a prime.

It is not a weakly prime, because it can be changed into another prime (64216819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32108424 + 32108425.

It is an arithmetic number, because the mean of its divisors is an integer number (32108425).

Almost surely, 2^64216849 is an apocalyptic number.

It is an amenable number.

64216849 is a deficient number, since it is larger than the sum of its proper divisors (1).

64216849 is an equidigital number, since it uses as much as digits as its factorization.

64216849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 40.

The square root of 64216849 is about 8013.5416015642. The cubic root of 64216849 is about 400.4512594708.

The spelling of 64216849 in words is "sixty-four million, two hundred sixteen thousand, eight hundred forty-nine".