16506536512 has 56 divisors (see below), whose sum is σ = 34889992704. Its totient is φ = 7721183232.

The previous prime is 16506536509. The next prime is 16506536513. The reversal of 16506536512 is 21563560561.

It is a super-2 number, since 2×16506536512² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16506536513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136273 + ... + 227119.

It is an arithmetic number, because the mean of its divisors is an integer number (623035584).

Almost surely, 2^16506536512 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 16506536512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17444996352).

16506536512 is an abundant number, since it is smaller than the sum of its proper divisors (18383456192).

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

16506536512 is a wasteful number, since it uses less digits than its factorization.

16506536512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91043 (or 91033 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 16506536512 in words is "sixteen billion, five hundred six million, five hundred thirty-six thousand, five hundred twelve".