64486918 has 4 divisors (see below), whose sum is σ = 96730380. Its totient is φ = 32243458.

The previous prime is 64486909. The next prime is 64486921. The reversal of 64486918 is 81968446.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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, 16121728 + ... + 16121731.

It is an arithmetic number, because the mean of its divisors is an integer number (24182595).

Almost surely, 2^64486918 is an apocalyptic number.

64486918 is a deficient number, since it is larger than the sum of its proper divisors (32243462).

64486918 is a wasteful number, since it uses less digits than its factorization.

64486918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32243461.

The product of its digits is 331776, while the sum is 46.

The square root of 64486918 is about 8030.3747110580. The cubic root of 64486918 is about 401.0118507369.

It can be divided in two parts, 6448 and 6918, that added together give a triangular number (13366 = T₁₆₃).

The spelling of 64486918 in words is "sixty-four million, four hundred eighty-six thousand, nine hundred eighteen".