16555069440 has 1248 divisors, whose sum is σ = 75299535360. Its totient is φ = 3418619904.

The previous prime is 16555069403. The next prime is 16555069457. The reversal of 16555069440 is 4496055561.

16555069440 = 609³ + 610³ + ... + 671³.

16555069440 is a `hidden beast` number, since 1 + 6 + 5 + 550 + 6 + 94 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1248).

It is a super-3 number, since 3×16555069440³ (a number of 32 digits) contains 333 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 352235497 + ... + 352235543.

Almost surely, 2^16555069440 is an apocalyptic number.

16555069440 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 16555069440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37649767680).

16555069440 is an abundant number, since it is smaller than the sum of its proper divisors (58744465920).

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

16555069440 is a wasteful number, since it uses less digits than its factorization.

16555069440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The spelling of 16555069440 in words is "sixteen billion, five hundred fifty-five million, sixty-nine thousand, four hundred forty".