50550055550581 has 2 divisors, whose sum is σ = 50550055550582. Its totient is φ = 50550055550580.

The previous prime is 50550055550521. The next prime is 50550055550591. The reversal of 50550055550581 is 18505555005505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49884132636900 + 665922913681 = 7062870^2 + 816041^2 .

It is a cyclic number.

It is not a de Polignac number, because 50550055550581 - 2²⁷ = 50549921332853 is a prime.

It is a super-2 number, since 2×50550055550581² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50550055550521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25275027775290 + 25275027775291.

It is an arithmetic number, because the mean of its divisors is an integer number (25275027775291).

Almost surely, 2^{50550055550581} is an apocalyptic number.

It is an amenable number.

50550055550581 is a deficient number, since it is larger than the sum of its proper divisors (1).

50550055550581 is an equidigital number, since it uses as much as digits as its factorization.

50550055550581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3125000, while the sum is 49.

The spelling of 50550055550581 in words is "fifty trillion, five hundred fifty billion, fifty-five million, five hundred fifty thousand, five hundred eighty-one".