16555220001572 has 24 divisors (see below), whose sum is σ = 33414205513920. Its totient is φ = 7030001676960.

The previous prime is 16555220001571. The next prime is 16555220001581. The reversal of 16555220001572 is 27510002255561.

It is a super-2 number, since 2×16555220001572² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16555220001571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2712188954 + ... + 2712195057.

It is an arithmetic number, because the mean of its divisors is an integer number (1392258563080).

Almost surely, 2^{16555220001572} is an apocalyptic number.

It is an amenable number.

16555220001572 is an abundant number, since it is smaller than the sum of its proper divisors (16858985512348).

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

16555220001572 is a wasteful number, since it uses less digits than its factorization.

16555220001572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5424384131 (or 5424384129 counting only the distinct ones).

The product of its (nonzero) digits is 210000, while the sum is 41.

The spelling of 16555220001572 in words is "sixteen trillion, five hundred fifty-five billion, two hundred twenty million, one thousand, five hundred seventy-two".