16555220624610 has 480 divisors, whose sum is σ = 49337615360880. Its totient is φ = 3969099104256.

The previous prime is 16555220624573. The next prime is 16555220624623. The reversal of 16555220624610 is 1642602255561.

16555220624610 is a `hidden beast` number, since 1 + 6 + 5 + 5 + 5 + 2 + 2 + 0 + 6 + 24 + 610 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 5110524858609 + 11444695766001 = 2260647^2 + 3383001^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

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 239 ways as a sum of consecutive naturals, for example, 10263620164 + ... + 10263621776.

Almost surely, 2^{16555220624610} is an apocalyptic number.

16555220624610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16555220624610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24668807680440).

16555220624610 is an abundant number, since it is smaller than the sum of its proper divisors (32782394736270).

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

16555220624610 is a wasteful number, since it uses less digits than its factorization.

16555220624610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3104 (or 3072 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 45.

The spelling of 16555220624610 in words is "sixteen trillion, five hundred fifty-five billion, two hundred twenty million, six hundred twenty-four thousand, six hundred ten".