216519318513 has 32 divisors (see below), whose sum is σ = 331917148800. Its totient is φ = 139332312000.

The previous prime is 216519318487. The next prime is 216519318553. The reversal of 216519318513 is 315813915612.

216519318513 is a `hidden beast` number, since 2 + 16 + 519 + 31 + 85 + 13 = 666.

It is not a de Polignac number, because 216519318513 - 2²⁵ = 216485764081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216519318553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3137803 + ... + 3206063.

It is an arithmetic number, because the mean of its divisors is an integer number (10372410900).

Almost surely, 2^216519318513 is an apocalyptic number.

It is an amenable number.

216519318513 is a deficient number, since it is larger than the sum of its proper divisors (115397830287).

216519318513 is a wasteful number, since it uses less digits than its factorization.

216519318513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72350 (or 72344 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The spelling of 216519318513 in words is "two hundred sixteen billion, five hundred nineteen million, three hundred eighteen thousand, five hundred thirteen".