64648918 has 4 divisors (see below), whose sum is σ = 96973380. Its totient is φ = 32324458.

The previous prime is 64648907. The next prime is 64648921. The reversal of 64648918 is 81984646.

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, 16162228 + ... + 16162231.

It is an arithmetic number, because the mean of its divisors is an integer number (24243345).

Almost surely, 2^64648918 is an apocalyptic number.

64648918 is a deficient number, since it is larger than the sum of its proper divisors (32324462).

64648918 is a wasteful number, since it uses less digits than its factorization.

64648918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32324461.

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

The square root of 64648918 is about 8040.4550866229. The cubic root of 64648918 is about 401.3473688968.

The spelling of 64648918 in words is "sixty-four million, six hundred forty-eight thousand, nine hundred eighteen".