6618819136 has 14 divisors (see below), whose sum is σ = 13134219350. Its totient is φ = 3309409536.

The previous prime is 6618819071. The next prime is 6618819167. The reversal of 6618819136 is 6319188166.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 5337179136 + 1281640000 = 73056^2 + 35800^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6618819136.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51709461 + ... + 51709588.

It is an arithmetic number, because the mean of its divisors is an integer number (938158525).

Almost surely, 2^6618819136 is an apocalyptic number.

It is an amenable number.

6618819136 is a deficient number, since it is larger than the sum of its proper divisors (6515400214).

6618819136 is a wasteful number, since it uses less digits than its factorization.

6618819136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103419061 (or 103419051 counting only the distinct ones).

The product of its digits is 373248, while the sum is 49.

The square root of 6618819136 is about 81356.1253747989. The cubic root of 6618819136 is about 1877.5586176049.

The spelling of 6618819136 in words is "six billion, six hundred eighteen million, eight hundred nineteen thousand, one hundred thirty-six".