64395481 has 2 divisors, whose sum is σ = 64395482. Its totient is φ = 64395480.

The previous prime is 64395433. The next prime is 64395521. The reversal of 64395481 is 18459346.

It is an a-pointer prime, because the next prime (64395521) can be obtained adding 64395481 to its sum of digits (40).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54686025 + 9709456 = 7395^2 + 3116^2 .

It is a cyclic number.

It is not a de Polignac number, because 64395481 - 2²⁵ = 30841049 is a prime.

It is a super-2 number, since 2×64395481² = 8293555946442722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64395181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32197740 + 32197741.

It is an arithmetic number, because the mean of its divisors is an integer number (32197741).

Almost surely, 2^64395481 is an apocalyptic number.

It is an amenable number.

64395481 is a deficient number, since it is larger than the sum of its proper divisors (1).

64395481 is an equidigital number, since it uses as much as digits as its factorization.

64395481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 40.

The square root of 64395481 is about 8024.6794951574. The cubic root of 64395481 is about 400.8222274470.

The spelling of 64395481 in words is "sixty-four million, three hundred ninety-five thousand, four hundred eighty-one".