64425447 has 12 divisors (see below), whose sum is σ = 97957080. Its totient is φ = 40689648.

The previous prime is 64425419. The next prime is 64425457. The reversal of 64425447 is 74452446.

64425447 is a `hidden beast` number, since 644 + 2 + 5 + 4 + 4 + 7 = 666.

It is not a de Polignac number, because 64425447 - 2⁸ = 64425191 is a prime.

It is a super-2 number, since 2×64425447² = 8301276442299618, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64425457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 188208 + ... + 188549.

It is an arithmetic number, because the mean of its divisors is an integer number (8163090).

Almost surely, 2^64425447 is an apocalyptic number.

64425447 is a deficient number, since it is larger than the sum of its proper divisors (33531633).

64425447 is a wasteful number, since it uses less digits than its factorization.

64425447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376782 (or 376779 counting only the distinct ones).

The product of its digits is 107520, while the sum is 36.

The square root of 64425447 is about 8026.5463930635. The cubic root of 64425447 is about 400.8843911065.

The spelling of 64425447 in words is "sixty-four million, four hundred twenty-five thousand, four hundred forty-seven".