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16228538662961 = 37438609153053
BaseRepresentation
bin1110110000101000000001…
…0010000100000000110001
32010110102200202120210001002
43230022000102010000301
54111342021344203321
654303142052451345
73263321213422502
oct354120022040061
963412622523032
1016228538662961
115197536aa8539
1219a1248919b55
139094631c63b1
1440167332aba9
151d221ca1a20b
hexec280484031

16228538662961 has 4 divisors (see below), whose sum is σ = 16667147816052. Its totient is φ = 15789929509872.

The previous prime is 16228538662939. The next prime is 16228538662993. The reversal of 16228538662961 is 16926683582261.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11246089683361 + 4982448979600 = 3353519^2 + 2232140^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-16228538662961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16228538661961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219304576490 + ... + 219304576563.

It is an arithmetic number, because the mean of its divisors is an integer number (4166786954013).

Almost surely, 216228538662961 is an apocalyptic number.

It is an amenable number.

16228538662961 is a deficient number, since it is larger than the sum of its proper divisors (438609153091).

16228538662961 is an equidigital number, since it uses as much as digits as its factorization.

16228538662961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438609153090.

The product of its digits is 89579520, while the sum is 65.

The spelling of 16228538662961 in words is "sixteen trillion, two hundred twenty-eight billion, five hundred thirty-eight million, six hundred sixty-two thousand, nine hundred sixty-one".

Divisors: 1 37 438609153053 16228538662961