64686931212 has 12 divisors (see below), whose sum is σ = 150936172856. Its totient is φ = 21562310400.

The previous prime is 64686931171. The next prime is 64686931219. The reversal of 64686931212 is 21213968646.

64686931212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (64686931219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2695288789 + ... + 2695288812.

Almost surely, 2^64686931212 is an apocalyptic number.

It is an amenable number.

64686931212 is an abundant number, since it is smaller than the sum of its proper divisors (86249241644).

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

64686931212 is a wasteful number, since it uses less digits than its factorization.

64686931212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5390577608 (or 5390577606 counting only the distinct ones).

The product of its digits is 746496, while the sum is 48.

The spelling of 64686931212 in words is "sixty-four billion, six hundred eighty-six million, nine hundred thirty-one thousand, two hundred twelve".