5642123872 has 144 divisors (see below), whose sum is σ = 14618403072. Its totient is φ = 2082205440.

The previous prime is 5642123867. The next prime is 5642123923. The reversal of 5642123872 is 2783212465.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 886333 + ... + 892675.

It is an arithmetic number, because the mean of its divisors is an integer number (101516688).

Almost surely, 2^5642123872 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 5642123872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7309201536).

5642123872 is an abundant number, since it is smaller than the sum of its proper divisors (8976279200).

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

5642123872 is a wasteful number, since it uses less digits than its factorization.

5642123872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6409 (or 6382 counting only the distinct ones).

The product of its digits is 161280, while the sum is 40.

The square root of 5642123872 is about 75114.0723965889. The cubic root of 5642123872 is about 1780.2494991763.

The spelling of 5642123872 in words is "five billion, six hundred forty-two million, one hundred twenty-three thousand, eight hundred seventy-two".