16555220321352 has 32 divisors (see below), whose sum is σ = 41520281016480. Its totient is φ = 5500776078720.

The previous prime is 16555220321303. The next prime is 16555220321357. The reversal of 16555220321352 is 25312302255561.

It is not an unprimeable number, because it can be changed into a prime (16555220321357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1101910774 + ... + 1101925797.

It is an arithmetic number, because the mean of its divisors is an integer number (1297508781765).

Almost surely, 2^{16555220321352} is an apocalyptic number.

16555220321352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16555220321352 is an abundant number, since it is smaller than the sum of its proper divisors (24965060695128).

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

16555220321352 is a wasteful number, since it uses less digits than its factorization.

16555220321352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2203836893 (or 2203836889 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 42.

The spelling of 16555220321352 in words is "sixteen trillion, five hundred fifty-five billion, two hundred twenty million, three hundred twenty-one thousand, three hundred fifty-two".