64675370788 has 48 divisors (see below), whose sum is σ = 132569990784. Its totient is φ = 27028834560.

The previous prime is 64675370729. The next prime is 64675370827. The reversal of 64675370788 is 88707357646.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2562406 + ... + 2587522.

It is an arithmetic number, because the mean of its divisors is an integer number (2761874808).

Almost surely, 2^64675370788 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64675370788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66284995392).

64675370788 is an abundant number, since it is smaller than the sum of its proper divisors (67894619996).

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

64675370788 is a wasteful number, since it uses less digits than its factorization.

64675370788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27412 (or 27410 counting only the distinct ones).

The product of its (nonzero) digits is 47416320, while the sum is 61.

The spelling of 64675370788 in words is "sixty-four billion, six hundred seventy-five million, three hundred seventy thousand, seven hundred eighty-eight".