50865656867 has 4 divisors (see below), whose sum is σ = 51253944456. Its totient is φ = 50477369280.

The previous prime is 50865656813. The next prime is 50865656873. The reversal of 50865656867 is 76865656805.

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

It is a cyclic number.

It is not a de Polignac number, because 50865656867 - 2¹⁰ = 50865655843 is a prime.

It is a super-2 number, since 2×50865656867² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50865656167) 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, 194143598 + ... + 194143859.

It is an arithmetic number, because the mean of its divisors is an integer number (12813486114).

Almost surely, 2^50865656867 is an apocalyptic number.

50865656867 is a deficient number, since it is larger than the sum of its proper divisors (388287589).

50865656867 is a wasteful number, since it uses less digits than its factorization.

50865656867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388287588.

The product of its (nonzero) digits is 72576000, while the sum is 62.

Subtracting from 50865656867 its sum of digits (62), we obtain a palindrome (50865656805).

The spelling of 50865656867 in words is "fifty billion, eight hundred sixty-five million, six hundred fifty-six thousand, eight hundred sixty-seven".