8128443542 has 16 divisors (see below), whose sum is σ = 12846870960. Its totient is φ = 3846569472.

The previous prime is 8128443541. The next prime is 8128443569. The reversal of 8128443542 is 2453448218.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 8128443542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8128443541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64283 + ... + 142790.

It is an arithmetic number, because the mean of its divisors is an integer number (802929435).

Almost surely, 2^8128443542 is an apocalyptic number.

8128443542 is a deficient number, since it is larger than the sum of its proper divisors (4718427418).

8128443542 is a wasteful number, since it uses less digits than its factorization.

8128443542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208127.

The product of its digits is 245760, while the sum is 41.

The square root of 8128443542 is about 90157.8811973751. The cubic root of 8128443542 is about 2010.6468502170.

The spelling of 8128443542 in words is "eight billion, one hundred twenty-eight million, four hundred forty-three thousand, five hundred forty-two".