4143442644 has 72 divisors (see below), whose sum is σ = 11476002720. Its totient is φ = 1250078400.

The previous prime is 4143442643. The next prime is 4143442703. The reversal of 4143442644 is 4462443414.

4143442644 is a `hidden beast` number, since 4 + 1 + 4 + 3 + 4 + 4 + 2 + 644 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 4143442599 and 4143442608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4143442643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67839 + ... + 113529.

Almost surely, 2^4143442644 is an apocalyptic number.

4143442644 is a gapful number since it is divisible by the number (44) 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 4143442644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5738001360).

4143442644 is an abundant number, since it is smaller than the sum of its proper divisors (7332560076).

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

4143442644 is a wasteful number, since it uses less digits than its factorization.

4143442644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45941 (or 45936 counting only the distinct ones).

The product of its digits is 147456, while the sum is 36.

The square root of 4143442644 is about 64369.5785600621. The cubic root of 4143442644 is about 1606.1537295196.

The spelling of 4143442644 in words is "four billion, one hundred forty-three million, four hundred forty-two thousand, six hundred forty-four".