50986585621 has 4 divisors (see below), whose sum is σ = 50991076192. Its totient is φ = 50982095052.

The previous prime is 50986585571. The next prime is 50986585627. The reversal of 50986585621 is 12658568905.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12658568905 = 5 ⋅2531713781.

It is a cyclic number.

It is not a de Polignac number, because 50986585621 - 2⁹ = 50986585109 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 (50986585627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2228211 + ... + 2250976.

It is an arithmetic number, because the mean of its divisors is an integer number (12747769048).

Almost surely, 2^50986585621 is an apocalyptic number.

It is an amenable number.

50986585621 is a deficient number, since it is larger than the sum of its proper divisors (4490571).

50986585621 is a wasteful number, since it uses less digits than its factorization.

50986585621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4490570.

The product of its (nonzero) digits is 5184000, while the sum is 55.

The spelling of 50986585621 in words is "fifty billion, nine hundred eighty-six million, five hundred eighty-five thousand, six hundred twenty-one".