16509699853716 has 48 divisors (see below), whose sum is σ = 38697265908224. Its totient is φ = 5478288132096.

The previous prime is 16509699853627. The next prime is 16509699853729. The reversal of 16509699853716 is 61735899690561.

It is a super-2 number, since 2×16509699853716² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 59142180 + ... + 59420676.

Almost surely, 2^{16509699853716} is an apocalyptic number.

It is an amenable number.

16509699853716 is an abundant number, since it is smaller than the sum of its proper divisors (22187566054508).

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

16509699853716 is a wasteful number, since it uses less digits than its factorization.

16509699853716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300880 (or 300878 counting only the distinct ones).

The product of its (nonzero) digits is 661348800, while the sum is 75.

The spelling of 16509699853716 in words is "sixteen trillion, five hundred nine billion, six hundred ninety-nine million, eight hundred fifty-three thousand, seven hundred sixteen".