16554427434525 has 24 divisors (see below), whose sum is σ = 27420578231584. Its totient is φ = 8812708113600.

The previous prime is 16554427434499. The next prime is 16554427434529. The reversal of 16554427434525 is 52543472445561.

It is not a de Polignac number, because 16554427434525 - 2¹³ = 16554427426333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16554427434529) by changing a digit.

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, 203957299 + ... + 204038448.

Almost surely, 2^{16554427434525} is an apocalyptic number.

16554427434525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16554427434525 is a deficient number, since it is larger than the sum of its proper divisors (10866150797059).

16554427434525 is a wasteful number, since it uses less digits than its factorization.

16554427434525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407996301 (or 407996296 counting only the distinct ones).

The product of its digits is 80640000, while the sum is 57.

The spelling of 16554427434525 in words is "sixteen trillion, five hundred fifty-four billion, four hundred twenty-seven million, four hundred thirty-four thousand, five hundred twenty-five".