64213319868 has 24 divisors (see below), whose sum is σ = 150924741072. Its totient is φ = 21248202624.

The previous prime is 64213319867. The next prime is 64213319917. The reversal of 64213319868 is 86891331246.

It is a self number, because there is not a number n which added to its sum of digits gives 64213319868.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64213319867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19527955 + ... + 19531242.

It is an arithmetic number, because the mean of its divisors is an integer number (6288530878).

Almost surely, 2^64213319868 is an apocalyptic number.

It is an amenable number.

64213319868 is an abundant number, since it is smaller than the sum of its proper divisors (86711421204).

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

64213319868 is a wasteful number, since it uses less digits than its factorization.

64213319868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39059341 (or 39059339 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 51.

The spelling of 64213319868 in words is "sixty-four billion, two hundred thirteen million, three hundred nineteen thousand, eight hundred sixty-eight".