16505231016 has 64 divisors (see below), whose sum is σ = 42318028800. Its totient is φ = 5362067648.

The previous prime is 16505230999. The next prime is 16505231021. The reversal of 16505231016 is 61013250561.

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, 238981 + ... + 300203.

It is an arithmetic number, because the mean of its divisors is an integer number (661219200).

Almost surely, 2^16505231016 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 16505231016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21159014400).

16505231016 is an abundant number, since it is smaller than the sum of its proper divisors (25812797784).

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

16505231016 is a wasteful number, since it uses less digits than its factorization.

16505231016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61518 (or 61514 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

Adding to 16505231016 its reverse (61013250561), we get a palindrome (77518481577).

The spelling of 16505231016 in words is "sixteen billion, five hundred five million, two hundred thirty-one thousand, sixteen".