64809314651 has 4 divisors (see below), whose sum is σ = 64819062672. Its totient is φ = 64799566632.

The previous prime is 64809314629. The next prime is 64809314671. The reversal of 64809314651 is 15641390846.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64809314651 - 2⁶ = 64809314587 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64809314596 and 64809314605.

It is not an unprimeable number, because it can be changed into a prime (64809314611) 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, 4864031 + ... + 4877336.

It is an arithmetic number, because the mean of its divisors is an integer number (16204765668).

Almost surely, 2^64809314651 is an apocalyptic number.

64809314651 is a deficient number, since it is larger than the sum of its proper divisors (9748021).

64809314651 is an equidigital number, since it uses as much as digits as its factorization.

64809314651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9748020.

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 64809314651 in words is "sixty-four billion, eight hundred nine million, three hundred fourteen thousand, six hundred fifty-one".