5656878847 has 2 divisors, whose sum is σ = 5656878848. Its totient is φ = 5656878846.

The previous prime is 5656878833. The next prime is 5656878991. The reversal of 5656878847 is 7488786565.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5656878847 - 2¹⁹ = 5656354559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5656878827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2828439423 + 2828439424.

It is an arithmetic number, because the mean of its divisors is an integer number (2828439424).

Almost surely, 2^5656878847 is an apocalyptic number.

5656878847 is a deficient number, since it is larger than the sum of its proper divisors (1).

5656878847 is an equidigital number, since it uses as much as digits as its factorization.

5656878847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90316800, while the sum is 64.

The square root of 5656878847 is about 75212.2253825799. The cubic root of 5656878847 is about 1781.8000188534.

The spelling of 5656878847 in words is "five billion, six hundred fifty-six million, eight hundred seventy-eight thousand, eight hundred forty-seven".