64813999999 has 24 divisors (see below), whose sum is σ = 75692452320. Its totient is φ = 54359433216.

The previous prime is 64813999997. The next prime is 64814000057. The reversal of 64813999999 is 99999931846.

It is not a de Polignac number, because 64813999999 - 2¹ = 64813999997 is a prime.

64813999999 is a modest number, since divided by 999999 gives 64813 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64813999997) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5856279 + ... + 5867335.

It is an arithmetic number, because the mean of its divisors is an integer number (3153852180).

Almost surely, 2^64813999999 is an apocalyptic number.

64813999999 is a deficient number, since it is larger than the sum of its proper divisors (10878452321).

64813999999 is an equidigital number, since it uses as much as digits as its factorization.

64813999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11347 (or 11250 counting only the distinct ones).

The product of its digits is 306110016, while the sum is 76.

The spelling of 64813999999 in words is "sixty-four billion, eight hundred thirteen million, nine hundred ninety-nine thousand, nine hundred ninety-nine".