64488691 has 8 divisors (see below), whose sum is σ = 66377520. Its totient is φ = 62617632.

The previous prime is 64488673. The next prime is 64488707. The reversal of 64488691 is 19688446.

64488691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64488691 - 2⁵ = 64488659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64408691) 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, 3105 + ... + 11773.

It is an arithmetic number, because the mean of its divisors is an integer number (8297190).

Almost surely, 2^64488691 is an apocalyptic number.

64488691 is a deficient number, since it is larger than the sum of its proper divisors (1888829).

64488691 is a wasteful number, since it uses less digits than its factorization.

64488691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8885.

The product of its digits is 331776, while the sum is 46.

The square root of 64488691 is about 8030.4851036535. The cubic root of 64488691 is about 401.0155258363.

The spelling of 64488691 in words is "sixty-four million, four hundred eighty-eight thousand, six hundred ninety-one".