6311669861 has 6 divisors (see below), whose sum is σ = 7342146630. Its totient is φ = 5410002696.

The previous prime is 6311669857. The next prime is 6311669879. The reversal of 6311669861 is 1689661136.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 5289652900 + 1022016961 = 72730^2 + 31969^2 .

It is not a de Polignac number, because 6311669861 - 2² = 6311669857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6311669561) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 64404746 + ... + 64404843.

It is an arithmetic number, because the mean of its divisors is an integer number (1223691105).

Almost surely, 2^6311669861 is an apocalyptic number.

It is an amenable number.

6311669861 is a deficient number, since it is larger than the sum of its proper divisors (1030476769).

6311669861 is a wasteful number, since it uses less digits than its factorization.

6311669861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128809603 (or 128809596 counting only the distinct ones).

The product of its digits is 279936, while the sum is 47.

The square root of 6311669861 is about 79446.0185346000. The cubic root of 6311669861 is about 1848.0544300237.

The spelling of 6311669861 in words is "six billion, three hundred eleven million, six hundred sixty-nine thousand, eight hundred sixty-one".