2658543642 has 48 divisors (see below), whose sum is σ = 6037312320. Its totient is φ = 843887616.

The previous prime is 2658543611. The next prime is 2658543649. The reversal of 2658543642 is 2463458562.

2658543642 is a `hidden beast` number, since 2 + 6 + 585 + 4 + 3 + 64 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (2658543649) 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, 79834 + ... + 108122.

It is an arithmetic number, because the mean of its divisors is an integer number (125777340).

Almost surely, 2^2658543642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2658543642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3018656160).

2658543642 is an abundant number, since it is smaller than the sum of its proper divisors (3378768678).

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

2658543642 is a wasteful number, since it uses less digits than its factorization.

2658543642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28547 (or 28544 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 45.

The square root of 2658543642 is about 51561.0671146360. The cubic root of 2658543642 is about 1385.3130688925.

The spelling of 2658543642 in words is "two billion, six hundred fifty-eight million, five hundred forty-three thousand, six hundred forty-two".