3138168661 has 4 divisors (see below), whose sum is σ = 3150379692. Its totient is φ = 3125957632.

The previous prime is 3138168629. The next prime is 3138168697. The reversal of 3138168661 is 1668618313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3005780625 + 132388036 = 54825^2 + 11506^2 .

It is a cyclic number.

It is not a de Polignac number, because 3138168661 - 2⁵ = 3138168629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3138118661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6105130 + ... + 6105643.

It is an arithmetic number, because the mean of its divisors is an integer number (787594923).

Almost surely, 2^3138168661 is an apocalyptic number.

It is an amenable number.

3138168661 is a deficient number, since it is larger than the sum of its proper divisors (12211031).

3138168661 is a wasteful number, since it uses less digits than its factorization.

3138168661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12211030.

The product of its digits is 124416, while the sum is 43.

The square root of 3138168661 is about 56019.3596982329. The cubic root of 3138168661 is about 1464.0596124524.

The spelling of 3138168661 in words is "three billion, one hundred thirty-eight million, one hundred sixty-eight thousand, six hundred sixty-one".