50643661 has 8 divisors (see below), whose sum is σ = 52012800. Its totient is φ = 49292880.

The previous prime is 50643613. The next prime is 50643727. The reversal of 50643661 is 16634605.

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

It is a cyclic number.

It is not a de Polignac number, because 50643661 - 2¹⁹ = 50119373 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 (50640661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1095 + ... + 10123.

It is an arithmetic number, because the mean of its divisors is an integer number (6501600).

Almost surely, 2^50643661 is an apocalyptic number.

It is an amenable number.

50643661 is a deficient number, since it is larger than the sum of its proper divisors (1369139).

50643661 is an equidigital number, since it uses as much as digits as its factorization.

50643661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9179.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 50643661 is about 7116.4359759644. The cubic root of 50643661 is about 369.9772593767.

The spelling of 50643661 in words is "fifty million, six hundred forty-three thousand, six hundred sixty-one".