64689105 has 16 divisors (see below), whose sum is σ = 111464640. Its totient is φ = 31846848.

The previous prime is 64689089. The next prime is 64689109. The reversal of 64689105 is 50198646.

It is not a de Polignac number, because 64689105 - 2⁴ = 64689089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (64689109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165675 + ... + 166064.

It is an arithmetic number, because the mean of its divisors is an integer number (6966540).

Almost surely, 2^64689105 is an apocalyptic number.

64689105 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64689105 is a deficient number, since it is larger than the sum of its proper divisors (46775535).

64689105 is a wasteful number, since it uses less digits than its factorization.

64689105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331760.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 64689105 is about 8042.9537484683. The cubic root of 64689105 is about 401.4305133966.

The spelling of 64689105 in words is "sixty-four million, six hundred eighty-nine thousand, one hundred five".