5645921907072 has 128 divisors (see below), whose sum is σ = 15195906633600. Its totient is φ = 1857171230720.

The previous prime is 5645921907071. The next prime is 5645921907097. The reversal of 5645921907072 is 2707091295465.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×5645921907072² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5645921907071) 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 15 ways as a sum of consecutive naturals, for example, 8690908 + ... + 9317924.

It is an arithmetic number, because the mean of its divisors is an integer number (118718020575).

Almost surely, 2^{5645921907072} 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 5645921907072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7597953316800).

5645921907072 is an abundant number, since it is smaller than the sum of its proper divisors (9549984726528).

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

5645921907072 is a wasteful number, since it uses less digits than its factorization.

5645921907072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627344 (or 627332 counting only the distinct ones).

The product of its (nonzero) digits is 9525600, while the sum is 57.

The spelling of 5645921907072 in words is "five trillion, six hundred forty-five billion, nine hundred twenty-one million, nine hundred seven thousand, seventy-two".