64709918 has 16 divisors (see below), whose sum is σ = 119464800. Its totient is φ = 25599456.

The previous prime is 64709903. The next prime is 64709923. The reversal of 64709918 is 81990746.

It is a Smith number, since the sum of its digits (44) 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 in 7 ways as a sum of consecutive naturals, for example, 177593 + ... + 177956.

It is an arithmetic number, because the mean of its divisors is an integer number (7466550).

Almost surely, 2^64709918 is an apocalyptic number.

64709918 is a deficient number, since it is larger than the sum of its proper divisors (54754882).

64709918 is a wasteful number, since it uses less digits than its factorization.

64709918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355571.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 64709918 is about 8044.2475098669. The cubic root of 64709918 is about 401.4735607144.

The spelling of 64709918 in words is "sixty-four million, seven hundred nine thousand, nine hundred eighteen".