50509100891 has 4 divisors (see below), whose sum is σ = 50509715784. Its totient is φ = 50508486000.

The previous prime is 50509100869. The next prime is 50509100893. The reversal of 50509100891 is 19800190505.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 50509100891 - 2⁶ = 50509100827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50509100893) 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, 160970 + ... + 356271.

It is an arithmetic number, because the mean of its divisors is an integer number (12627428946).

Almost surely, 2^50509100891 is an apocalyptic number.

50509100891 is a deficient number, since it is larger than the sum of its proper divisors (614893).

50509100891 is an equidigital number, since it uses as much as digits as its factorization.

50509100891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614892.

The product of its (nonzero) digits is 16200, while the sum is 38.

The spelling of 50509100891 in words is "fifty billion, five hundred nine million, one hundred thousand, eight hundred ninety-one".