201615722021516 has 48 divisors (see below), whose sum is σ = 411019613383680. Its totient is φ = 85629086088000.

The previous prime is 201615722021501. The next prime is 201615722021569. The reversal of 201615722021516 is 615120227516102.

201615722021516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2548445150 + ... + 2548524261.

It is an arithmetic number, because the mean of its divisors is an integer number (8562908612160).

Almost surely, 2^{201615722021516} is an apocalyptic number.

It is an amenable number.

201615722021516 is an abundant number, since it is smaller than the sum of its proper divisors (209403891362164).

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

201615722021516 is a wasteful number, since it uses less digits than its factorization.

201615722021516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5096969486 (or 5096969484 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 41.

Adding to 201615722021516 its reverse (615120227516102), we get a palindrome (816735949537618).

The spelling of 201615722021516 in words is "two hundred one trillion, six hundred fifteen billion, seven hundred twenty-two million, twenty-one thousand, five hundred sixteen".