515065680 has 240 divisors, whose sum is σ = 1901128320. Its totient is φ = 124388352.

The previous prime is 515065679. The next prime is 515065709. The reversal of 515065680 is 86560515.

515065680 is a `hidden beast` number, since 515 + 0 + 65 + 6 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

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, 313822 + ... + 315458.

It is an arithmetic number, because the mean of its divisors is an integer number (7921368).

Almost surely, 2^515065680 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 515065680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (950564160).

515065680 is an abundant number, since it is smaller than the sum of its proper divisors (1386062640).

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

515065680 is a wasteful number, since it uses less digits than its factorization.

515065680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1698 (or 1689 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 515065680 is about 22695.0584929848. The cubic root of 515065680 is about 801.5935320453.

The spelling of 515065680 in words is "five hundred fifteen million, sixty-five thousand, six hundred eighty".