5111165606550 has 96 divisors (see below), whose sum is σ = 12834380502432. Its totient is φ = 1346017198080.

The previous prime is 5111165606539. The next prime is 5111165606551. The reversal of 5111165606550 is 556065611115.

It is a super-2 number, since 2×5111165606550² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5111165606551) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3321802 + ... + 4610498.

It is an arithmetic number, because the mean of its divisors is an integer number (133691463567).

Almost surely, 2^{5111165606550} is an apocalyptic number.

5111165606550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 5111165606550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6417190251216).

5111165606550 is an abundant number, since it is smaller than the sum of its proper divisors (7723214895882).

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

5111165606550 is a wasteful number, since it uses less digits than its factorization.

5111165606550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289042 (or 1289037 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 42.

The spelling of 5111165606550 in words is "five trillion, one hundred eleven billion, one hundred sixty-five million, six hundred six thousand, five hundred fifty".