6543582155 has 32 divisors (see below), whose sum is σ = 8691779520. Its totient is φ = 4689541120.

The previous prime is 6543582107. The next prime is 6543582161. The reversal of 6543582155 is 5512853456.

It is a happy number.

It is not a de Polignac number, because 6543582155 - 2⁸ = 6543581899 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1549607 + ... + 1553823.

It is an arithmetic number, because the mean of its divisors is an integer number (271618110).

Almost surely, 2^6543582155 is an apocalyptic number.

6543582155 is a deficient number, since it is larger than the sum of its proper divisors (2148197365).

6543582155 is a wasteful number, since it uses less digits than its factorization.

6543582155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4639.

The product of its digits is 720000, while the sum is 44.

The square root of 6543582155 is about 80892.4109852092. The cubic root of 6543582155 is about 1870.4173389596.

The spelling of 6543582155 in words is "six billion, five hundred forty-three million, five hundred eighty-two thousand, one hundred fifty-five".