64709518 has 4 divisors (see below), whose sum is σ = 97064280. Its totient is φ = 32354758.

The previous prime is 64709479. The next prime is 64709537. The reversal of 64709518 is 81590746.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 16177378 + ... + 16177381.

It is an arithmetic number, because the mean of its divisors is an integer number (24266070).

Almost surely, 2^64709518 is an apocalyptic number.

64709518 is a deficient number, since it is larger than the sum of its proper divisors (32354762).

64709518 is a wasteful number, since it uses less digits than its factorization.

64709518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32354761.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 64709518 is about 8044.2226473414. Note that the first 3 decimals coincide. The cubic root of 64709518 is about 401.4727334855.

The spelling of 64709518 in words is "sixty-four million, seven hundred nine thousand, five hundred eighteen".