50505500000640 has 512 divisors, whose sum is σ = 175001057280000. Its totient is φ = 12342373539840.

The previous prime is 50505500000639. The next prime is 50505500000653. The reversal of 50505500000640 is 4600000550505.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 50505500000598 and 50505500000607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3052236847 + ... + 3052253393.

It is an arithmetic number, because the mean of its divisors is an integer number (341798940000).

Almost surely, 2^{50505500000640} 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 50505500000640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87500528640000).

50505500000640 is an abundant number, since it is smaller than the sum of its proper divisors (124495557279360).

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

50505500000640 is a wasteful number, since it uses less digits than its factorization.

50505500000640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19318 (or 19306 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The spelling of 50505500000640 in words is "fifty trillion, five hundred five billion, five hundred million, six hundred forty", and thus it is an aban number.