6181771816 has 32 divisors (see below), whose sum is σ = 12647584800. Its totient is φ = 2809218240.

The previous prime is 6181771777. The next prime is 6181771837.

It is a happy number.

6181771816 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 629875 + ... + 639613.

It is an arithmetic number, because the mean of its divisors is an integer number (395237025).

Almost surely, 2^6181771816 is an apocalyptic number.

It is an amenable number.

6181771816 is an abundant number, since it is smaller than the sum of its proper divisors (6465812984).

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

6181771816 is a wasteful number, since it uses less digits than its factorization.

6181771816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16969 (or 16965 counting only the distinct ones).

The product of its digits is 112896, while the sum is 46.

The square root of 6181771816 is about 78624.2444542394. The cubic root of 6181771816 is about 1835.2884158370.

The spelling of 6181771816 in words is "six billion, one hundred eighty-one million, seven hundred seventy-one thousand, eight hundred sixteen".