16555220321358 has 32 divisors (see below), whose sum is σ = 33259267731456. Its totient is φ = 5493628090368.

The previous prime is 16555220321357. The next prime is 16555220321363. The reversal of 16555220321358 is 85312302255561.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 663616 + ... + 5792307.

It is an arithmetic number, because the mean of its divisors is an integer number (1039352116608).

Almost surely, 2^{16555220321358} is an apocalyptic number.

16555220321358 is an abundant number, since it is smaller than the sum of its proper divisors (16704047410098).

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

16555220321358 is a wasteful number, since it uses less digits than its factorization.

16555220321358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6457848.

The product of its (nonzero) digits is 2160000, while the sum is 48.

The spelling of 16555220321358 in words is "sixteen trillion, five hundred fifty-five billion, two hundred twenty million, three hundred twenty-one thousand, three hundred fifty-eight".