50864452081 has 4 divisors (see below), whose sum is σ = 53856478692. Its totient is φ = 47872425472.

The previous prime is 50864452073. The next prime is 50864452099. The reversal of 50864452081 is 18025446805.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18025446805 = 5 ⋅3605089361.

It can be written as a sum of positive squares in 2 ways, for example, as 34897602481 + 15966849600 = 186809^2 + 126360^2 .

It is a cyclic number.

It is not a de Polignac number, because 50864452081 - 2³ = 50864452073 is a prime.

It is a super-2 number, since 2×50864452081² (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 (50864452061) 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, 1496013280 + ... + 1496013313.

It is an arithmetic number, because the mean of its divisors is an integer number (13464119673).

Almost surely, 2^50864452081 is an apocalyptic number.

It is an amenable number.

50864452081 is a deficient number, since it is larger than the sum of its proper divisors (2992026611).

50864452081 is a wasteful number, since it uses less digits than its factorization.

50864452081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2992026610.

The product of its (nonzero) digits is 307200, while the sum is 43.

Adding to 50864452081 its reverse (18025446805), we get a palindrome (68889898886).

The spelling of 50864452081 in words is "fifty billion, eight hundred sixty-four million, four hundred fifty-two thousand, eighty-one".