5115561660 has 144 divisors (see below), whose sum is σ = 17014233600. Its totient is φ = 1233809280.

The previous prime is 5115561637. The next prime is 5115561673. The reversal of 5115561660 is 661655115.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 387529 + ... + 400511.

It is an arithmetic number, because the mean of its divisors is an integer number (118154400).

Almost surely, 2^5115561660 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 5115561660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8507116800).

5115561660 is an abundant number, since it is smaller than the sum of its proper divisors (11898671940).

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

5115561660 is a wasteful number, since it uses less digits than its factorization.

5115561660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13208 (or 13203 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 5115561660 is about 71523.1547123028. The cubic root of 5115561660 is about 1723.0495812959.

The spelling of 5115561660 in words is "five billion, one hundred fifteen million, five hundred sixty-one thousand, six hundred sixty".