64808885 has 4 divisors (see below), whose sum is σ = 77770668. Its totient is φ = 51847104.

The previous prime is 64808839. The next prime is 64808921. The reversal of 64808885 is 58880846.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35832196 + 28976689 = 5986^2 + 5383^2 .

It is a cyclic number.

It is not a de Polignac number, because 64808885 - 2¹⁰ = 64807861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6480884 + ... + 6480893.

It is an arithmetic number, because the mean of its divisors is an integer number (19442667).

Almost surely, 2^64808885 is an apocalyptic number.

It is an amenable number.

64808885 is a deficient number, since it is larger than the sum of its proper divisors (12961783).

64808885 is a wasteful number, since it uses less digits than its factorization.

64808885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12961782.

The product of its (nonzero) digits is 491520, while the sum is 47.

The square root of 64808885 is about 8050.3965740825. The cubic root of 64808885 is about 401.6781269627.

The spelling of 64808885 in words is "sixty-four million, eight hundred eight thousand, eight hundred eighty-five".