42649568128 has 96 divisors (see below), whose sum is σ = 91149266520. Its totient is φ = 19869926400.

The previous prime is 42649568111. The next prime is 42649568141. The reversal of 42649568128 is 82186594624.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2811123 + ... + 2826253.

Almost surely, 2^42649568128 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 42649568128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45574633260).

42649568128 is an abundant number, since it is smaller than the sum of its proper divisors (48499698392).

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

42649568128 is a wasteful number, since it uses less digits than its factorization.

42649568128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15244 (or 15213 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 55.

The spelling of 42649568128 in words is "forty-two billion, six hundred forty-nine million, five hundred sixty-eight thousand, one hundred twenty-eight".