16501516651516 has 18 divisors (see below), whose sum is σ = 31269885845352. Its totient is φ = 7616084608080.

The previous prime is 16501516651511. The next prime is 16501516651523. The reversal of 16501516651516 is 61515661510561.

16501516651516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 16501516651516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16501516651511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12205263120 + ... + 12205264471.

Almost surely, 2^{16501516651516} is an apocalyptic number.

It is an amenable number.

16501516651516 is a deficient number, since it is larger than the sum of its proper divisors (14768369193836).

16501516651516 is a wasteful number, since it uses less digits than its factorization.

16501516651516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24410527621 (or 24410527606 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 49.

The spelling of 16501516651516 in words is "sixteen trillion, five hundred one billion, five hundred sixteen million, six hundred fifty-one thousand, five hundred sixteen".