6555728249 has 24 divisors (see below), whose sum is σ = 7844495232. Its totient is φ = 5366433600.

The previous prime is 6555728243. The next prime is 6555728261. The reversal of 6555728249 is 9428275556.

It is a happy number.

It is not a de Polignac number, because 6555728249 - 2²⁴ = 6538951033 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6555728249.

It is not an unprimeable number, because it can be changed into a prime (6555728243) 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, 3639149 + ... + 3640949.

It is an arithmetic number, because the mean of its divisors is an integer number (326853968).

Almost surely, 2^6555728249 is an apocalyptic number.

It is an amenable number.

6555728249 is a deficient number, since it is larger than the sum of its proper divisors (1288766983).

6555728249 is a wasteful number, since it uses less digits than its factorization.

6555728249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2837 (or 2814 counting only the distinct ones).

The product of its digits is 6048000, while the sum is 53.

The square root of 6555728249 is about 80967.4517877400. The cubic root of 6555728249 is about 1871.5739033780.

The spelling of 6555728249 in words is "six billion, five hundred fifty-five million, seven hundred twenty-eight thousand, two hundred forty-nine".