50561216505 has 96 divisors (see below), whose sum is σ = 91354558464. Its totient is φ = 25847797248.

The previous prime is 50561216423. The next prime is 50561216513.

50561216505 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 50561216505 - 2⁸ = 50561216249 is a prime.

It is a super-2 number, since 2×50561216505² (a number of 22 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 50561216505.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 33197674 + ... + 33199196.

It is an arithmetic number, because the mean of its divisors is an integer number (951609984).

Almost surely, 2^50561216505 is an apocalyptic number.

It is an amenable number.

50561216505 is a deficient number, since it is larger than the sum of its proper divisors (40793341959).

50561216505 is a wasteful number, since it uses less digits than its factorization.

50561216505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1855 (or 1852 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The spelling of 50561216505 in words is "fifty billion, five hundred sixty-one million, two hundred sixteen thousand, five hundred five".