64851889 has 6 divisors (see below), whose sum is σ = 68891414. Its totient is φ = 61036800.

The previous prime is 64851887. The next prime is 64851901. The reversal of 64851889 is 98815846.

It can be written as a sum of positive squares in 3 ways, for example, as 12723489 + 52128400 = 3567^2 + 7220^2 .

It is not a de Polignac number, because 64851889 - 2¹ = 64851887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64851887) 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 5 ways as a sum of consecutive naturals, for example, 111912 + ... + 112489.

Almost surely, 2^64851889 is an apocalyptic number.

It is an amenable number.

64851889 is a deficient number, since it is larger than the sum of its proper divisors (4039525).

64851889 is a wasteful number, since it uses less digits than its factorization.

64851889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224435 (or 224418 counting only the distinct ones).

The product of its digits is 552960, while the sum is 49.

The square root of 64851889 is about 8053.0670554764. The cubic root of 64851889 is about 401.7669519589.

The spelling of 64851889 in words is "sixty-four million, eight hundred fifty-one thousand, eight hundred eighty-nine".