16555220317400 has 96 divisors (see below), whose sum is σ = 39435065369280. Its totient is φ = 6459692928000.

The previous prime is 16555220317351. The next prime is 16555220317411. The reversal of 16555220317400 is 471302255561.

It is a super-3 number, since 3×16555220317400³ (a number of 41 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 61702337 + ... + 61970063.

It is an arithmetic number, because the mean of its divisors is an integer number (410781930930).

Almost surely, 2^{16555220317400} is an apocalyptic number.

16555220317400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16555220317400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19717532684640).

16555220317400 is an abundant number, since it is smaller than the sum of its proper divisors (22879845051880).

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

16555220317400 is a wasteful number, since it uses less digits than its factorization.

16555220317400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275325 (or 275316 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 41.

The spelling of 16555220317400 in words is "sixteen trillion, five hundred fifty-five billion, two hundred twenty million, three hundred seventeen thousand, four hundred".