2644031967808 has 224 divisors, whose sum is σ = 6972709651200. Its totient is φ = 963034152960.

The previous prime is 2644031967779. The next prime is 2644031967851. The reversal of 2644031967808 is 8087691304462.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (224).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 12376716 + ... + 12588532.

Almost surely, 2^{2644031967808} is an apocalyptic number.

2644031967808 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2644031967808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3486354825600).

2644031967808 is an abundant number, since it is smaller than the sum of its proper divisors (4328677683392).

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

2644031967808 is a wasteful number, since it uses less digits than its factorization.

2644031967808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212013 (or 212003 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 58.

The spelling of 2644031967808 in words is "two trillion, six hundred forty-four billion, thirty-one million, nine hundred sixty-seven thousand, eight hundred eight".