2115042642 has 48 divisors (see below), whose sum is σ = 4758953472. Its totient is φ = 678156480.

The previous prime is 2115042619. The next prime is 2115042697. The reversal of 2115042642 is 2462405112.

2115042642 is a `hidden beast` number, since 2 + 1 + 15 + 0 + 4 + 2 + 642 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81838 + ... + 104534.

It is an arithmetic number, because the mean of its divisors is an integer number (99144864).

Almost surely, 2^2115042642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2115042642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2379476736).

2115042642 is an abundant number, since it is smaller than the sum of its proper divisors (2643910830).

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

2115042642 is a wasteful number, since it uses less digits than its factorization.

2115042642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22903 (or 22900 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 2115042642 is about 45989.5927574924. The cubic root of 2115042642 is about 1283.6295587544.

Adding to 2115042642 its reverse (2462405112), we get a palindrome (4577447754).

The spelling of 2115042642 in words is "two billion, one hundred fifteen million, forty-two thousand, six hundred forty-two".