64534889 has 12 divisors (see below), whose sum is σ = 68211780. Its totient is φ = 60967200.

The previous prime is 64534853. The next prime is 64534891. The reversal of 64534889 is 98843546.

It can be written as a sum of positive squares in 2 ways, for example, as 14592400 + 49942489 = 3820^2 + 7067^2 .

It is a de Polignac number, because none of the positive numbers 2^k-64534889 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64534819) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 337784 + ... + 337974.

It is an arithmetic number, because the mean of its divisors is an integer number (5684315).

Almost surely, 2^64534889 is an apocalyptic number.

It is an amenable number.

64534889 is a deficient number, since it is larger than the sum of its proper divisors (3676891).

64534889 is an equidigital number, since it uses as much as digits as its factorization.

64534889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472 (or 281 counting only the distinct ones).

The product of its digits is 829440, while the sum is 47.

The square root of 64534889 is about 8033.3610027186. The cubic root of 64534889 is about 401.1112619665. Note that the first 3 decimals are identical.

The spelling of 64534889 in words is "sixty-four million, five hundred thirty-four thousand, eight hundred eighty-nine".