64768918 has 4 divisors (see below), whose sum is σ = 97153380. Its totient is φ = 32384458.

The previous prime is 64768909. The next prime is 64768931. The reversal of 64768918 is 81986746.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 16192228 + ... + 16192231.

It is an arithmetic number, because the mean of its divisors is an integer number (24288345).

Almost surely, 2^64768918 is an apocalyptic number.

64768918 is a deficient number, since it is larger than the sum of its proper divisors (32384462).

64768918 is a wasteful number, since it uses less digits than its factorization.

64768918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32384461.

The product of its digits is 580608, while the sum is 49.

The square root of 64768918 is about 8047.9138911894. The cubic root of 64768918 is about 401.5955396707.

The spelling of 64768918 in words is "sixty-four million, seven hundred sixty-eight thousand, nine hundred eighteen".