16505869252208 has 160 divisors (see below), whose sum is σ = 40396104091008. Its totient is φ = 6371691724800.

The previous prime is 16505869252193. The next prime is 16505869252211. The reversal of 16505869252208 is 80225296850561.

It is a super-2 number, since 2×16505869252208² (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 31 ways as a sum of consecutive naturals, for example, 2376848 + ... + 6217808.

Almost surely, 2^{16505869252208} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16505869252208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20198052045504).

16505869252208 is an abundant number, since it is smaller than the sum of its proper divisors (23890234838800).

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

16505869252208 is a wasteful number, since it uses less digits than its factorization.

16505869252208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3841091 (or 3841085 counting only the distinct ones).

The product of its (nonzero) digits is 20736000, while the sum is 59.

The spelling of 16505869252208 in words is "sixteen trillion, five hundred five billion, eight hundred sixty-nine million, two hundred fifty-two thousand, two hundred eight".