64115689 has 16 divisors (see below), whose sum is σ = 71712000. Its totient is φ = 56833920.

The previous prime is 64115683. The next prime is 64115707. The reversal of 64115689 is 98651146.

It is not a de Polignac number, because 64115689 - 2¹¹ = 64113641 is a prime.

It is a super-2 number, since 2×64115689² = 8221643151889442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64115683) 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, 76927 + ... + 77755.

It is an arithmetic number, because the mean of its divisors is an integer number (4482000).

Almost surely, 2^64115689 is an apocalyptic number.

It is an amenable number.

64115689 is a deficient number, since it is larger than the sum of its proper divisors (7596311).

64115689 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (64115688) it forms an eRAP, since the sums of their prime factors are consecutive (1007 and 1008).

64115689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008.

The product of its digits is 51840, while the sum is 40.

The square root of 64115689 is about 8007.2272978853. The cubic root of 64115689 is about 400.2408736706.

It can be divided in two parts, 6411 and 5689, that added together give a square (12100 = 110²).

The spelling of 64115689 in words is "sixty-four million, one hundred fifteen thousand, six hundred eighty-nine".