64840105 has 16 divisors (see below), whose sum is σ = 88573824. Its totient is φ = 45105280.

The previous prime is 64840093. The next prime is 64840109. The reversal of 64840105 is 50104846.

It is not a de Polignac number, because 64840105 - 2¹⁷ = 64709033 is a prime.

It is a super-2 number, since 2×64840105² = 8408478432822050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64840109) 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, 24364 + ... + 26893.

It is an arithmetic number, because the mean of its divisors is an integer number (5535864).

Almost surely, 2^64840105 is an apocalyptic number.

It is an amenable number.

64840105 is a deficient number, since it is larger than the sum of its proper divisors (23733719).

64840105 is a wasteful number, since it uses less digits than its factorization.

64840105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51296.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 64840105 is about 8052.3353755293. The cubic root of 64840105 is about 401.7426159495.

The spelling of 64840105 in words is "sixty-four million, eight hundred forty thousand, one hundred five".