16520364315 has 360 divisors, whose sum is σ = 38881690848. Its totient is φ = 6566676480.

The previous prime is 16520364313. The next prime is 16520364323. The reversal of 16520364315 is 51346302561.

16520364315 is a `hidden beast` number, since 1 + 6 + 5 + 2 + 0 + 3 + 643 + 1 + 5 = 666.

It is not a de Polignac number, because 16520364315 - 2¹ = 16520364313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16520364315.

It is not an unprimeable number, because it can be changed into a prime (16520364313) by changing a digit.

It is a polite number, since it can be written in 359 ways as a sum of consecutive naturals, for example, 402935695 + ... + 402935735.

Almost surely, 2^16520364315 is an apocalyptic number.

16520364315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16520364315 is an abundant number, since it is smaller than the sum of its proper divisors (22361326533).

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

16520364315 is a wasteful number, since it uses less digits than its factorization.

16520364315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

Adding to 16520364315 its reverse (51346302561), we get a palindrome (67866666876).

The spelling of 16520364315 in words is "sixteen billion, five hundred twenty million, three hundred sixty-four thousand, three hundred fifteen".