64870660064 has 24 divisors (see below), whose sum is σ = 145958985648. Its totient is φ = 27801711360.

The previous prime is 64870660051. The next prime is 64870660079. The reversal of 64870660064 is 46006607846.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144800357 + ... + 144800804.

It is an arithmetic number, because the mean of its divisors is an integer number (6081624402).

Almost surely, 2^64870660064 is an apocalyptic number.

It is an amenable number.

64870660064 is an abundant number, since it is smaller than the sum of its proper divisors (81088325584).

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

64870660064 is a wasteful number, since it uses less digits than its factorization.

64870660064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289601178 (or 289601170 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 47.

The spelling of 64870660064 in words is "sixty-four billion, eight hundred seventy million, six hundred sixty thousand, sixty-four".