5123856811 has 4 divisors (see below), whose sum is σ = 5124252672. Its totient is φ = 5123460952.

The previous prime is 5123856791. The next prime is 5123856821. The reversal of 5123856811 is 1186583215.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1186583215 = 5 ⋅237316643.

It is a cyclic number.

It is not a de Polignac number, because 5123856811 - 2⁹ = 5123856299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5123856821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177835 + ... + 204628.

It is an arithmetic number, because the mean of its divisors is an integer number (1281063168).

Almost surely, 2^5123856811 is an apocalyptic number.

5123856811 is a deficient number, since it is larger than the sum of its proper divisors (395861).

5123856811 is a wasteful number, since it uses less digits than its factorization.

5123856811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395860.

The product of its digits is 57600, while the sum is 40.

The square root of 5123856811 is about 71581.1204927668. The cubic root of 5123856811 is about 1723.9804167067.

The spelling of 5123856811 in words is "five billion, one hundred twenty-three million, eight hundred fifty-six thousand, eight hundred eleven".