64690859112 has 256 divisors, whose sum is σ = 186523223040. Its totient is φ = 18520320000.

The previous prime is 64690859059. The next prime is 64690859113. The reversal of 64690859112 is 21195809646.

It is not an unprimeable number, because it can be changed into a prime (64690859113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 60971062 + ... + 60972122.

It is an arithmetic number, because the mean of its divisors is an integer number (728606340).

Almost surely, 2^64690859112 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 64690859112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93261611520).

64690859112 is an abundant number, since it is smaller than the sum of its proper divisors (121832363928).

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

64690859112 is a wasteful number, since it uses less digits than its factorization.

64690859112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296 (or 1292 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 51.

The spelling of 64690859112 in words is "sixty-four billion, six hundred ninety million, eight hundred fifty-nine thousand, one hundred twelve".