64851868 has 6 divisors (see below), whose sum is σ = 113490776. Its totient is φ = 32425932.

The previous prime is 64851863. The next prime is 64851887. The reversal of 64851868 is 86815846.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64851863) 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 as a sum of consecutive naturals, namely, 8106480 + ... + 8106487.

Almost surely, 2^64851868 is an apocalyptic number.

It is an amenable number.

64851868 is a deficient number, since it is larger than the sum of its proper divisors (48638908).

64851868 is a wasteful number, since it uses less digits than its factorization.

64851868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16212971 (or 16212969 counting only the distinct ones).

The product of its digits is 368640, while the sum is 46.

The square root of 64851868 is about 8053.0657516253. The cubic root of 64851868 is about 401.7669085929.

The spelling of 64851868 in words is "sixty-four million, eight hundred fifty-one thousand, eight hundred sixty-eight".