50550061661 has 4 divisors (see below), whose sum is σ = 55145521824. Its totient is φ = 45954601500.

The previous prime is 50550061657. The next prime is 50550061673. The reversal of 50550061661 is 16616005505.

50550061661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 50550061661 - 2² = 50550061657 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 (50550061651) 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, 2297730065 + ... + 2297730086.

It is an arithmetic number, because the mean of its divisors is an integer number (13786380456).

Almost surely, 2^50550061661 is an apocalyptic number.

It is an amenable number.

50550061661 is a deficient number, since it is larger than the sum of its proper divisors (4595460163).

50550061661 is a wasteful number, since it uses less digits than its factorization.

50550061661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4595460162.

The product of its (nonzero) digits is 27000, while the sum is 35.

The spelling of 50550061661 in words is "fifty billion, five hundred fifty million, sixty-one thousand, six hundred sixty-one".