16061216161656 has 128 divisors (see below), whose sum is σ = 41901321254400. Its totient is φ = 5125576296960.

The previous prime is 16061216161651. The next prime is 16061216161667. The reversal of 16061216161656 is 65616161216061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16061216161651) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31841191 + ... + 32341673.

It is an arithmetic number, because the mean of its divisors is an integer number (327354072300).

Almost surely, 2^{16061216161656} 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 16061216161656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20950660627200).

16061216161656 is an abundant number, since it is smaller than the sum of its proper divisors (25840105092744).

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

16061216161656 is a wasteful number, since it uses less digits than its factorization.

16061216161656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501109 (or 501105 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 48.

The spelling of 16061216161656 in words is "sixteen trillion, sixty-one billion, two hundred sixteen million, one hundred sixty-one thousand, six hundred fifty-six".