16000505550 has 36 divisors (see below), whose sum is σ = 42988026120. Its totient is φ = 4266801360.

The previous prime is 16000505533. The next prime is 16000505557. The reversal of 16000505550 is 5550500061.

16000505550 is a `hidden beast` number, since 1 + 60 + 0 + 0 + 50 + 5 + 550 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16000505557) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 17777890 + ... + 17778789.

Almost surely, 2^16000505550 is an apocalyptic number.

16000505550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16000505550 is an abundant number, since it is smaller than the sum of its proper divisors (26987520570).

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

16000505550 is a wasteful number, since it uses less digits than its factorization.

16000505550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35556697 (or 35556689 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 27.

The spelling of 16000505550 in words is "sixteen billion, five hundred five thousand, five hundred fifty".