16565510052 has 144 divisors (see below), whose sum is σ = 53199956992. Its totient is φ = 4227966720.

The previous prime is 16565510047. The next prime is 16565510077. The reversal of 16565510052 is 25001556561.

16565510052 is a `hidden beast` number, since 1 + 6 + 56 + 551 + 0 + 0 + 52 = 666.

It is a super-2 number, since 2×16565510052² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 16565509989 and 16565510016.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19998 + ... + 183114.

Almost surely, 2^16565510052 is an apocalyptic number.

16565510052 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 16565510052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26599978496).

16565510052 is an abundant number, since it is smaller than the sum of its proper divisors (36634446940).

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

16565510052 is a wasteful number, since it uses less digits than its factorization.

16565510052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163178 (or 163173 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The spelling of 16565510052 in words is "sixteen billion, five hundred sixty-five million, five hundred ten thousand, fifty-two".