64809000918 has 24 divisors (see below), whose sum is σ = 142721463456. Its totient is φ = 21248852400.

The previous prime is 64809000917. The next prime is 64809000947. The reversal of 64809000918 is 81900090846.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64809000917) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29511198 + ... + 29513393.

It is an arithmetic number, because the mean of its divisors is an integer number (5946727644).

Almost surely, 2^64809000918 is an apocalyptic number.

64809000918 is an abundant number, since it is smaller than the sum of its proper divisors (77912462538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64809000918 is a wasteful number, since it uses less digits than its factorization.

64809000918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59024660 (or 59024657 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The spelling of 64809000918 in words is "sixty-four billion, eight hundred nine million, nine hundred eighteen", and thus it is an aban number.