6213161986 has 8 divisors (see below), whose sum is σ = 9320171004. Its totient is φ = 3106438320.

The previous prime is 6213161951. The next prime is 6213161993. The reversal of 6213161986 is 6891613126.

It can be written as a sum of positive squares in 2 ways, for example, as 5900544225 + 312617761 = 76815^2 + 17681^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4305 + ... + 111556.

Almost surely, 2^6213161986 is an apocalyptic number.

6213161986 is a deficient number, since it is larger than the sum of its proper divisors (3107009018).

6213161986 is a wasteful number, since it uses less digits than its factorization.

6213161986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142676.

The product of its digits is 93312, while the sum is 43.

The square root of 6213161986 is about 78823.6131244946. The cubic root of 6213161986 is about 1838.3896182852.

The spelling of 6213161986 in words is "six billion, two hundred thirteen million, one hundred sixty-one thousand, nine hundred eighty-six".