6543820902 has 16 divisors (see below), whose sum is σ = 13092552000. Its totient is φ = 2180455272.

The previous prime is 6543820901. The next prime is 6543820903. The reversal of 6543820902 is 2090283456.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6543820901) and next prime (6543820903).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6543820901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187152 + ... + 219347.

It is an arithmetic number, because the mean of its divisors is an integer number (818284500).

Almost surely, 2^6543820902 is an apocalyptic number.

6543820902 is an abundant number, since it is smaller than the sum of its proper divisors (6548731098).

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

6543820902 is a wasteful number, since it uses less digits than its factorization.

6543820902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409187.

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 6543820902 is about 80893.8866787843. The cubic root of 6543820902 is about 1870.4400864949.

The spelling of 6543820902 in words is "six billion, five hundred forty-three million, eight hundred twenty thousand, nine hundred two".