515565612216 has 96 divisors (see below), whose sum is σ = 1416322908000. Its totient is φ = 169394883840.

The previous prime is 515565612203. The next prime is 515565612223. The reversal of 515565612216 is 612216565515.

It is a happy number.

515565612216 is a `hidden beast` number, since 5 + 1 + 5 + 5 + 6 + 5 + 612 + 21 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28398310 + ... + 28416458.

It is an arithmetic number, because the mean of its divisors is an integer number (14753363625).

Almost surely, 2^515565612216 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 515565612216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (708161454000).

515565612216 is an abundant number, since it is smaller than the sum of its proper divisors (900757295784).

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

515565612216 is a wasteful number, since it uses less digits than its factorization.

515565612216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23789 (or 23782 counting only the distinct ones).

The product of its digits is 540000, while the sum is 45.

The spelling of 515565612216 in words is "five hundred fifteen billion, five hundred sixty-five million, six hundred twelve thousand, two hundred sixteen".