16555434126 has 64 divisors (see below), whose sum is σ = 41399769600. Its totient is φ = 4287749760.

The previous prime is 16555434121. The next prime is 16555434127. The reversal of 16555434126 is 62143455561.

16555434126 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16555434121) 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 31 ways as a sum of consecutive naturals, for example, 109900 + ... + 212576.

It is an arithmetic number, because the mean of its divisors is an integer number (646871400).

Almost surely, 2^16555434126 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16555434126, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20699884800).

16555434126 is an abundant number, since it is smaller than the sum of its proper divisors (24844335474).

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

16555434126 is a wasteful number, since it uses less digits than its factorization.

16555434126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103049.

The product of its digits is 432000, while the sum is 42.

Adding to 16555434126 its reverse (62143455561), we get a palindrome (78698889687).

The spelling of 16555434126 in words is "sixteen billion, five hundred fifty-five million, four hundred thirty-four thousand, one hundred twenty-six".