50611591816581 has 8 divisors (see below), whose sum is σ = 67632416683200. Its totient is φ = 33665914080512.

The previous prime is 50611591816579. The next prime is 50611591816589. The reversal of 50611591816581 is 18561819511605.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 50611591816581 - 2¹ = 50611591816579 is a prime.

It is a super-2 number, since 2×50611591816581² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50611591816589) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18786781065 + ... + 18786783758.

It is an arithmetic number, because the mean of its divisors is an integer number (8454052085400).

Almost surely, 2^{50611591816581} is an apocalyptic number.

It is an amenable number.

50611591816581 is a deficient number, since it is larger than the sum of its proper divisors (17020824866619).

50611591816581 is a wasteful number, since it uses less digits than its factorization.

50611591816581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37573565275.

The product of its (nonzero) digits is 2592000, while the sum is 57.

The spelling of 50611591816581 in words is "fifty trillion, six hundred eleven billion, five hundred ninety-one million, eight hundred sixteen thousand, five hundred eighty-one".