56855389811 has 4 divisors (see below), whose sum is σ = 62024061624. Its totient is φ = 51686718000.

The previous prime is 56855389763. The next prime is 56855389813. The reversal of 56855389811 is 11898355865.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56855389811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56855389813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2584335890 + ... + 2584335911.

It is an arithmetic number, because the mean of its divisors is an integer number (15506015406).

Almost surely, 2^56855389811 is an apocalyptic number.

56855389811 is a deficient number, since it is larger than the sum of its proper divisors (5168671813).

56855389811 is a wasteful number, since it uses less digits than its factorization.

56855389811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5168671812.

The product of its digits is 10368000, while the sum is 59.

The spelling of 56855389811 in words is "fifty-six billion, eight hundred fifty-five million, three hundred eighty-nine thousand, eight hundred eleven".