16561901526192 has 480 divisors, whose sum is σ = 52947301155840. Its totient is φ = 4787827200000.

The previous prime is 16561901526161. The next prime is 16561901526193. The reversal of 16561901526192 is 29162510916561.

16561901526192 is a `hidden beast` number, since 1 + 6 + 5 + 6 + 1 + 9 + 0 + 15 + 2 + 619 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (16561901526193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5094400567 + ... + 5094403817.

It is an arithmetic number, because the mean of its divisors is an integer number (110306877408).

Almost surely, 2^{16561901526192} is an apocalyptic number.

16561901526192 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16561901526192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26473650577920).

16561901526192 is an abundant number, since it is smaller than the sum of its proper divisors (36385399629648).

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

16561901526192 is a wasteful number, since it uses less digits than its factorization.

16561901526192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5033 (or 5024 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 54.

The spelling of 16561901526192 in words is "sixteen trillion, five hundred sixty-one billion, nine hundred one million, five hundred twenty-six thousand, one hundred ninety-two".