5111165680 has 80 divisors (see below), whose sum is σ = 12533438880. Its totient is φ = 1933065216.

The previous prime is 5111165671. The next prime is 5111165687. The reversal of 5111165680 is 865611115.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×5111165680² = 52248029216819724800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5111165687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 843622 + ... + 849658.

It is an arithmetic number, because the mean of its divisors is an integer number (156667986).

Almost surely, 2^5111165680 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 5111165680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6266719440).

5111165680 is an abundant number, since it is smaller than the sum of its proper divisors (7422273200).

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

5111165680 is a wasteful number, since it uses less digits than its factorization.

5111165680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6626 (or 6620 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 34.

The square root of 5111165680 is about 71492.4169405399. The cubic root of 5111165680 is about 1722.5558810460. Note that the first 3 decimals are identical.

Adding to 5111165680 its reverse (865611115), we get a palindrome (5976776795).

The spelling of 5111165680 in words is "five billion, one hundred eleven million, one hundred sixty-five thousand, six hundred eighty".