16501052516 has 72 divisors (see below), whose sum is σ = 33295475304. Its totient is φ = 7127377920.

The previous prime is 16501052497. The next prime is 16501052537. The reversal of 16501052516 is 61525010561.

It can be written as a sum of positive squares in 12 ways, for example, as 12928599616 + 3572452900 = 113704^2 + 59770^2 .

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, 2076086 + ... + 2084018.

It is an arithmetic number, because the mean of its divisors is an integer number (462437157).

Almost surely, 2^16501052516 is an apocalyptic number.

It is an amenable number.

16501052516 is an abundant number, since it is smaller than the sum of its proper divisors (16794422788).

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

16501052516 is a wasteful number, since it uses less digits than its factorization.

16501052516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8161 (or 8146 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 32.

The spelling of 16501052516 in words is "sixteen billion, five hundred one million, fifty-two thousand, five hundred sixteen".