16626089481620 has 54 divisors (see below), whose sum is σ = 35588055821598. Its totient is φ = 6524576580288.

The previous prime is 16626089481611. The next prime is 16626089481623. The reversal of 16626089481620 is 2618498062661.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 4550422781584 + 12075666700036 = 2133172^2 + 3475006^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16626089481620.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16626089481623) 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 17 ways as a sum of consecutive naturals, for example, 966455939 + ... + 966473141.

Almost surely, 2^{16626089481620} is an apocalyptic number.

16626089481620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16626089481620 is an abundant number, since it is smaller than the sum of its proper divisors (18961966339978).

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

16626089481620 is an frugal number, since it uses more digits than its factorization.

16626089481620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34521 (or 17263 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 59.

The spelling of 16626089481620 in words is "sixteen trillion, six hundred twenty-six billion, eighty-nine million, four hundred eighty-one thousand, six hundred twenty".