16555507352064 has 240 divisors, whose sum is σ = 48292334842752. Its totient is φ = 5459472728064.

The previous prime is 16555507351987. The next prime is 16555507352081. The reversal of 16555507352064 is 46025370555561.

16555507352064 is a `hidden beast` number, since 1 + 6 + 5 + 5 + 5 + 50 + 7 + 3 + 520 + 64 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 16555507352064.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 490269709 + ... + 490303475.

Almost surely, 2^{16555507352064} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16555507352064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24146167421376).

16555507352064 is an abundant number, since it is smaller than the sum of its proper divisors (31736827490688).

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

16555507352064 is a wasteful number, since it uses less digits than its factorization.

16555507352064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34927 (or 34908 counting only the distinct ones).

The product of its (nonzero) digits is 18900000, while the sum is 54.

The spelling of 16555507352064 in words is "sixteen trillion, five hundred fifty-five billion, five hundred seven million, three hundred fifty-two thousand, sixty-four".