50891190181 has 8 divisors (see below), whose sum is σ = 56142626904. Its totient is φ = 45830714880.

The previous prime is 50891190179. The next prime is 50891190221. The reversal of 50891190181 is 18109119805.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7986281956 + 42904908225 = 89366^2 + 207135^2 .

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 50891190181 - 2¹ = 50891190179 is a prime.

It is a super-2 number, since 2×50891190181² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50891193181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47739796 + ... + 47740861.

It is an arithmetic number, because the mean of its divisors is an integer number (7017828363).

Almost surely, 2^50891190181 is an apocalyptic number.

It is an amenable number.

50891190181 is a deficient number, since it is larger than the sum of its proper divisors (5251436723).

50891190181 is a wasteful number, since it uses less digits than its factorization.

50891190181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95480711.

The product of its (nonzero) digits is 25920, while the sum is 43.

The spelling of 50891190181 in words is "fifty billion, eight hundred ninety-one million, one hundred ninety thousand, one hundred eighty-one".