50561660 has 72 divisors (see below), whose sum is σ = 115214400. Its totient is φ = 18626688.

The previous prime is 50561657. The next prime is 50561663. The reversal of 50561660 is 6616505.

It is an interprime number because it is at equal distance from previous prime (50561657) and next prime (50561663).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50561663) 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 23 ways as a sum of consecutive naturals, for example, 339266 + ... + 339414.

It is an arithmetic number, because the mean of its divisors is an integer number (1600200).

Almost surely, 2^50561660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 50561660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57607200).

50561660 is an abundant number, since it is smaller than the sum of its proper divisors (64652740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

50561660 is a wasteful number, since it uses less digits than its factorization.

50561660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243 (or 222 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 50561660 is about 7110.6722607641. The cubic root of 50561660 is about 369.7774654054. Note that the first 3 decimals are identical.

The spelling of 50561660 in words is "fifty million, five hundred sixty-one thousand, six hundred sixty".