16520055552 has 1296 divisors, whose sum is σ = 70022534400. Its totient is φ = 3622993920.

The previous prime is 16520055529. The next prime is 16520055611. The reversal of 16520055552 is 25555002561.

16520055552 is a `hidden beast` number, since 1 + 6 + 52 + 0 + 0 + 55 + 552 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 569657074 + ... + 569657102.

Almost surely, 2^16520055552 is an apocalyptic number.

16520055552 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 16520055552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35011267200).

16520055552 is an abundant number, since it is smaller than the sum of its proper divisors (53502478848).

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

16520055552 is a wasteful number, since it uses less digits than its factorization.

16520055552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 36.

The spelling of 16520055552 in words is "sixteen billion, five hundred twenty million, fifty-five thousand, five hundred fifty-two".