50661609 has 8 divisors (see below), whose sum is σ = 69196512. Its totient is φ = 32950560.

The previous prime is 50661607. The next prime is 50661613. The reversal of 50661609 is 90616605.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 50661609 - 2¹ = 50661607 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 50661609.

It is not an unprimeable number, because it can be changed into a prime (50661601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205819 + ... + 206064.

It is an arithmetic number, because the mean of its divisors is an integer number (8649564).

Almost surely, 2^50661609 is an apocalyptic number.

It is an amenable number.

50661609 is a deficient number, since it is larger than the sum of its proper divisors (18534903).

50661609 is a wasteful number, since it uses less digits than its factorization.

50661609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411927.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 50661609 is about 7117.6968887415. The cubic root of 50661609 is about 370.0209605851.

The spelling of 50661609 in words is "fifty million, six hundred sixty-one thousand, six hundred nine".