64446471 has 12 divisors (see below), whose sum is σ = 93173080. Its totient is φ = 42925680.

The previous prime is 64446457. The next prime is 64446493. The reversal of 64446471 is 17464446.

64446471 is a `hidden beast` number, since 6 + 4 + 4 + 4 + 647 + 1 = 666.

64446471 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64446471 - 2¹¹ = 64444423 is a prime.

It is a super-3 number, since 3×64446471³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64446971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10356 + ... + 15366.

Almost surely, 2^64446471 is an apocalyptic number.

64446471 is a deficient number, since it is larger than the sum of its proper divisors (28726609).

64446471 is a wasteful number, since it uses less digits than its factorization.

64446471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6446 (or 6443 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 64446471 is about 8027.8559404115. The cubic root of 64446471 is about 400.9279933227.

The spelling of 64446471 in words is "sixty-four million, four hundred forty-six thousand, four hundred seventy-one".