64802552009 has 8 divisors (see below), whose sum is σ = 71489495112. Its totient is φ = 58358770560.

The previous prime is 64802551973. The next prime is 64802552029. The reversal of 64802552009 is 90025520846.

It can be written as a sum of positive squares in 4 ways, for example, as 3815779984 + 60986772025 = 61772^2 + 246955^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64802552009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64802552029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60789854 + ... + 60790919.

It is an arithmetic number, because the mean of its divisors is an integer number (8936186889).

Almost surely, 2^64802552009 is an apocalyptic number.

It is an amenable number.

64802552009 is a deficient number, since it is larger than the sum of its proper divisors (6686943103).

64802552009 is a wasteful number, since it uses less digits than its factorization.

64802552009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121580827.

The product of its (nonzero) digits is 172800, while the sum is 41.

The spelling of 64802552009 in words is "sixty-four billion, eight hundred two million, five hundred fifty-two thousand, nine".