50505049999991 has 4 divisors (see below), whose sum is σ = 50634883033800. Its totient is φ = 50375216966184.

The previous prime is 50505049999969. The next prime is 50505050000039. The reversal of 50505049999991 is 19999994050505.

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 50505049999991 - 2¹⁸ = 50505049737847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50405049999991) 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, 64916516321 + ... + 64916517098.

It is an arithmetic number, because the mean of its divisors is an integer number (12658720758450).

Almost surely, 2^{50505049999991} is an apocalyptic number.

50505049999991 is a deficient number, since it is larger than the sum of its proper divisors (129833033809).

50505049999991 is a wasteful number, since it uses less digits than its factorization.

50505049999991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129833033808.

The product of its (nonzero) digits is 265720500, while the sum is 74.

The spelling of 50505049999991 in words is "fifty trillion, five hundred five billion, forty-nine million, nine hundred ninety-nine thousand, nine hundred ninety-one".