16555220623016 has 16 divisors (see below), whose sum is σ = 32042362496640. Its totient is φ = 8010590623920.

The previous prime is 16555220622979. The next prime is 16555220623027. The reversal of 16555220623016 is 61032602255561.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33377460686 + ... + 33377461181.

It is an arithmetic number, because the mean of its divisors is an integer number (2002647656040).

Almost surely, 2^{16555220623016} is an apocalyptic number.

It is an amenable number.

16555220623016 is a deficient number, since it is larger than the sum of its proper divisors (15487141873624).

16555220623016 is a wasteful number, since it uses less digits than its factorization.

16555220623016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66754921904 (or 66754921900 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 44.

Adding to 16555220623016 its reverse (61032602255561), we get a palindrome (77587822878577).

The spelling of 16555220623016 in words is "sixteen trillion, five hundred fifty-five billion, two hundred twenty million, six hundred twenty-three thousand, sixteen".