6542868544 has 21 divisors (see below), whose sum is σ = 12984788991. Its totient is φ = 3271110720.

The previous prime is 6542868517. The next prime is 6542868547. The reversal of 6542868544 is 4458682456.

It is a happy number.

The square root of 6542868544 is 80888.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6542868491 and 6542868500.

It is not an unprimeable number, because it can be changed into a prime (6542868547) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 642049 + ... + 652159.

Almost surely, 2^6542868544 is an apocalyptic number.

6542868544 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

6542868544 is the 80888-th square number.

It is an amenable number.

6542868544 is a deficient number, since it is larger than the sum of its proper divisors (6441920447).

6542868544 is an frugal number, since it uses more digits than its factorization.

6542868544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20234 (or 10113 counting only the distinct ones).

The product of its digits is 7372800, while the sum is 52.

The cubic root of 6542868544 is about 1870.3493436384.

The spelling of 6542868544 in words is "six billion, five hundred forty-two million, eight hundred sixty-eight thousand, five hundred forty-four".