64444841692 has 24 divisors (see below), whose sum is σ = 140606928000. Its totient is φ = 25108379760.

The previous prime is 64444841683. The next prime is 64444841693. The reversal of 64444841692 is 29614844446.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64444841693) 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, 104617942 + ... + 104618557.

It is an arithmetic number, because the mean of its divisors is an integer number (5858622000).

Almost surely, 2^64444841692 is an apocalyptic number.

It is an amenable number.

64444841692 is an abundant number, since it is smaller than the sum of its proper divisors (76162086308).

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

64444841692 is a wasteful number, since it uses less digits than its factorization.

64444841692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209236521 (or 209236519 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 52.

The spelling of 64444841692 in words is "sixty-four billion, four hundred forty-four million, eight hundred forty-one thousand, six hundred ninety-two".