64516689 has 8 divisors (see below), whose sum is σ = 95580320. Its totient is φ = 43011108.

The previous prime is 64516687. The next prime is 64516703. The reversal of 64516689 is 98661546.

64516689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64516689 - 2¹ = 64516687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64516681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1194727 + ... + 1194780.

It is an arithmetic number, because the mean of its divisors is an integer number (11947540).

Almost surely, 2^64516689 is an apocalyptic number.

It is an amenable number.

64516689 is a deficient number, since it is larger than the sum of its proper divisors (31063631).

64516689 is a wasteful number, since it uses less digits than its factorization.

64516689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2389516 (or 2389510 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 64516689 is about 8032.2281466602. The cubic root of 64516689 is about 401.0735515566.

The spelling of 64516689 in words is "sixty-four million, five hundred sixteen thousand, six hundred eighty-nine".