16552564640 has 24 divisors (see below), whose sum is σ = 39105434340. Its totient is φ = 6621025792.

The previous prime is 16552564597. The next prime is 16552564663. The reversal of 16552564640 is 4646525561.

16552564640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 16111732624 + 440832016 = 126932^2 + 20996^2 .

It is a super-2 number, since 2×16552564640² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16552564591 and 16552564600.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 51726605 + ... + 51726924.

Almost surely, 2^16552564640 is an apocalyptic number.

16552564640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16552564640 is an abundant number, since it is smaller than the sum of its proper divisors (22552869700).

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

16552564640 is a wasteful number, since it uses less digits than its factorization.

16552564640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103453544 (or 103453536 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 44.

The spelling of 16552564640 in words is "sixteen billion, five hundred fifty-two million, five hundred sixty-four thousand, six hundred forty".