5678138461 has 2 divisors, whose sum is σ = 5678138462. Its totient is φ = 5678138460.

The previous prime is 5678138393. The next prime is 5678138471. The reversal of 5678138461 is 1648318765.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4718316100 + 959822361 = 68690^2 + 30981^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5678138461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5678138471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2839069230 + 2839069231.

It is an arithmetic number, because the mean of its divisors is an integer number (2839069231).

Almost surely, 2^5678138461 is an apocalyptic number.

It is an amenable number.

5678138461 is a deficient number, since it is larger than the sum of its proper divisors (1).

5678138461 is an equidigital number, since it uses as much as digits as its factorization.

5678138461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 967680, while the sum is 49.

The square root of 5678138461 is about 75353.4236846608. The cubic root of 5678138461 is about 1784.0293415722.

The spelling of 5678138461 in words is "five billion, six hundred seventy-eight million, one hundred thirty-eight thousand, four hundred sixty-one".