64885405 has 8 divisors (see below), whose sum is σ = 83851992. Its totient is φ = 47915328.

The previous prime is 64885397. The next prime is 64885417. The reversal of 64885405 is 50458846.

It can be written as a sum of positive squares in 4 ways, for example, as 10686361 + 54199044 = 3269^2 + 7362^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 64885405 - 2³ = 64885397 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 7 ways as a sum of consecutive naturals, for example, 499054 + ... + 499183.

It is an arithmetic number, because the mean of its divisors is an integer number (10481499).

Almost surely, 2^64885405 is an apocalyptic number.

64885405 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64885405 is a deficient number, since it is larger than the sum of its proper divisors (18966587).

64885405 is a wasteful number, since it uses less digits than its factorization.

64885405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998255.

The product of its (nonzero) digits is 153600, while the sum is 40.

The square root of 64885405 is about 8055.1477329718. The cubic root of 64885405 is about 401.8361522157.

The spelling of 64885405 in words is "sixty-four million, eight hundred eighty-five thousand, four hundred five".