2143354445544 has 128 divisors (see below), whose sum is σ = 5829469793280. Its totient is φ = 652766208000.

The previous prime is 2143354445521. The next prime is 2143354445563. The reversal of 2143354445544 is 4455444533412.

It is a super-2 number, since 2×2143354445544² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2143354445493 and 2143354445502.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 130041784 + ... + 130058264.

It is an arithmetic number, because the mean of its divisors is an integer number (45542732760).

Almost surely, 2^{2143354445544} is an apocalyptic number.

2143354445544 is a gapful number since it is divisible by the number (24) 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 2143354445544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2914734896640).

2143354445544 is an abundant number, since it is smaller than the sum of its proper divisors (3686115347736).

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

2143354445544 is a wasteful number, since it uses less digits than its factorization.

2143354445544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20731 (or 20727 counting only the distinct ones).

The product of its digits is 9216000, while the sum is 48.

Adding to 2143354445544 its reverse (4455444533412), we get a palindrome (6598798978956).

The spelling of 2143354445544 in words is "two trillion, one hundred forty-three billion, three hundred fifty-four million, four hundred forty-five thousand, five hundred forty-four".