64809000313 has 4 divisors (see below), whose sum is σ = 64809605988. Its totient is φ = 64808394640.

The previous prime is 64809000301. The next prime is 64809000337. The reversal of 64809000313 is 31300090846.

64809000313 = 180012² + 180013².

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 32404680169 + 32404320144 = 180013^2 + 180012^2 .

It is a cyclic number.

It is not a de Polignac number, because 64809000313 - 2¹³ = 64808992121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64809000383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94606 + ... + 372247.

It is an arithmetic number, because the mean of its divisors is an integer number (16202401497).

Almost surely, 2^64809000313 is an apocalyptic number.

64809000313 is the 180013-rd centered square number.

It is an amenable number.

64809000313 is a deficient number, since it is larger than the sum of its proper divisors (605675).

64809000313 is a wasteful number, since it uses less digits than its factorization.

64809000313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605674.

The product of its (nonzero) digits is 15552, while the sum is 34.

The spelling of 64809000313 in words is "sixty-four billion, eight hundred nine million, three hundred thirteen", and thus it is an aban number.