50061644640 has 288 divisors, whose sum is σ = 196124737536. Its totient is φ = 11390837760.

The previous prime is 50061644623. The next prime is 50061644641. The reversal of 50061644640 is 4644616005.

50061644640 is a `hidden beast` number, since 5 + 0 + 0 + 6 + 1 + 6 + 4 + 4 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 50061644595 and 50061644604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50061644641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2236705 + ... + 2258975.

It is an arithmetic number, because the mean of its divisors is an integer number (680988672).

Almost surely, 2^50061644640 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 50061644640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98062368768).

50061644640 is an abundant number, since it is smaller than the sum of its proper divisors (146063092896).

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

50061644640 is a wasteful number, since it uses less digits than its factorization.

50061644640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22522 (or 22511 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 50061644640 in words is "fifty billion, sixty-one million, six hundred forty-four thousand, six hundred forty".