16551537900 has 72 divisors (see below), whose sum is σ = 47981137344. Its totient is φ = 4405262400.

The previous prime is 16551537881. The next prime is 16551537917. The reversal of 16551537900 is 973515561.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 104155 + ... + 209645.

Almost surely, 2^16551537900 is an apocalyptic number.

16551537900 is a gapful number since it is divisible by the number (10) 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 16551537900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23990568672).

16551537900 is an abundant number, since it is smaller than the sum of its proper divisors (31429599444).

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

16551537900 is a wasteful number, since it uses less digits than its factorization.

16551537900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106031 (or 106024 counting only the distinct ones).

The product of its (nonzero) digits is 141750, while the sum is 42.

The spelling of 16551537900 in words is "sixteen billion, five hundred fifty-one million, five hundred thirty-seven thousand, nine hundred".