1777424641361 has 18 divisors (see below), whose sum is σ = 1852685129862. Its totient is φ = 1704198706560.

The previous prime is 1777424641357. The next prime is 1777424641379. The reversal of 1777424641361 is 1631464247771.

It can be written as a sum of positive squares in 3 ways, for example, as 225297369025 + 1552127272336 = 474655^2 + 1245844^2 .

It is not a de Polignac number, because 1777424641361 - 2² = 1777424641357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1777424641351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 503660645 + ... + 503664173.

It is an arithmetic number, because the mean of its divisors is an integer number (102926951659).

Almost surely, 2^{1777424641361} is an apocalyptic number.

It is an amenable number.

1777424641361 is a deficient number, since it is larger than the sum of its proper divisors (75260488501).

1777424641361 is an frugal number, since it uses more digits than its factorization.

1777424641361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7217 (or 3629 counting only the distinct ones).

The product of its digits is 4741632, while the sum is 53.

The spelling of 1777424641361 in words is "one trillion, seven hundred seventy-seven billion, four hundred twenty-four million, six hundred forty-one thousand, three hundred sixty-one".