64198385 has 4 divisors (see below), whose sum is σ = 77038068. Its totient is φ = 51358704.

The previous prime is 64198369. The next prime is 64198391. The reversal of 64198385 is 58389146.

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 22505536 + 41692849 = 4744^2 + 6457^2 .

It is a cyclic number.

It is not a de Polignac number, because 64198385 - 2⁴ = 64198369 is a prime.

It is a Duffinian 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, 6419834 + ... + 6419843.

It is an arithmetic number, because the mean of its divisors is an integer number (19259517).

Almost surely, 2^64198385 is an apocalyptic number.

It is an amenable number.

64198385 is a deficient number, since it is larger than the sum of its proper divisors (12839683).

64198385 is a wasteful number, since it uses less digits than its factorization.

64198385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12839682.

The product of its digits is 207360, while the sum is 44.

The square root of 64198385 is about 8012.3894688164. The cubic root of 64198385 is about 400.4128757707.

The spelling of 64198385 in words is "sixty-four million, one hundred ninety-eight thousand, three hundred eighty-five".