1773608669361 has 27 divisors (see below), whose sum is σ = 2678246874667. Its totient is φ = 1130938234800.

The previous prime is 1773608669323. The next prime is 1773608669411. The reversal of 1773608669361 is 1639668063771.

The square root of 1773608669361 is 1331769.

It is a perfect power (a square), and thus also a powerful number.

1773608669361 is a `hidden beast` number, since 1 + 77 + 360 + 8 + 66 + 93 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1000862185761 + 772746483600 = 1000431^2 + 879060^2 .

It is not a de Polignac number, because 1773608669361 - 2¹⁹ = 1773608145073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1773608667361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 91882411 + ... + 91901711.

Almost surely, 2^{1773608669361} is an apocalyptic number.

1773608669361 is the 1331769-th square number.

1773608669361 is the 665885-th centered octagonal number.

It is an amenable number.

1773608669361 is a deficient number, since it is larger than the sum of its proper divisors (904638205306).

1773608669361 is an frugal number, since it uses more digits than its factorization.

1773608669361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38654 (or 19327 counting only the distinct ones).

The product of its (nonzero) digits is 41150592, while the sum is 63.

It can be divided in two parts, 1773608 and 669361, that added together give a square (2442969 = 1563²).

The spelling of 1773608669361 in words is "one trillion, seven hundred seventy-three billion, six hundred eight million, six hundred sixty-nine thousand, three hundred sixty-one".