50515561500 has 192 divisors, whose sum is σ = 151388869632. Its totient is φ = 13081824000.

The previous prime is 50515561493. The next prime is 50515561501. The reversal of 50515561500 is 516551505.

50515561500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50515561501) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11672337 + ... + 11676663.

It is an arithmetic number, because the mean of its divisors is an integer number (788483696).

Almost surely, 2^50515561500 is an apocalyptic number.

50515561500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 50515561500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75694434816).

50515561500 is an abundant number, since it is smaller than the sum of its proper divisors (100873308132).

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

50515561500 is a wasteful number, since it uses less digits than its factorization.

50515561500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4573 (or 4561 counting only the distinct ones).

The product of its (nonzero) digits is 18750, while the sum is 33.

The spelling of 50515561500 in words is "fifty billion, five hundred fifteen million, five hundred sixty-one thousand, five hundred".