16565451056 has 160 divisors (see below), whose sum is σ = 40613971968. Its totient is φ = 6358302720.

The previous prime is 16565451053. The next prime is 16565451103. The reversal of 16565451056 is 65015456561.

It is a happy number.

16565451056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 16565450998 and 16565451016.

It is not an unprimeable number, because it can be changed into a prime (16565451053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35778281 + ... + 35778743.

Almost surely, 2^16565451056 is an apocalyptic number.

16565451056 is a gapful number since it is divisible by the number (16) 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 16565451056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20306985984).

16565451056 is an abundant number, since it is smaller than the sum of its proper divisors (24048520912).

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

16565451056 is a wasteful number, since it uses less digits than its factorization.

16565451056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859 (or 853 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 44.

The spelling of 16565451056 in words is "sixteen billion, five hundred sixty-five million, four hundred fifty-one thousand, fifty-six".