64852649 has 4 divisors (see below), whose sum is σ = 65326164. Its totient is φ = 64379136.

The previous prime is 64852639. The next prime is 64852657. The reversal of 64852649 is 94625846.

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 11854249 + 52998400 = 3443^2 + 7280^2 .

It is a cyclic number.

It is not a de Polignac number, because 64852649 - 2⁴ = 64852633 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64852639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236552 + ... + 236825.

It is an arithmetic number, because the mean of its divisors is an integer number (16331541).

Almost surely, 2^64852649 is an apocalyptic number.

It is an amenable number.

64852649 is a deficient number, since it is larger than the sum of its proper divisors (473515).

64852649 is a wasteful number, since it uses less digits than its factorization.

64852649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473514.

The product of its digits is 414720, while the sum is 44.

The square root of 64852649 is about 8053.1142423289. The cubic root of 64852649 is about 401.7685213899.

The spelling of 64852649 in words is "sixty-four million, eight hundred fifty-two thousand, six hundred forty-nine".