1730700744721 has 9 divisors (see below), whose sum is σ = 1874090923281. Its totient is φ = 1597554131472.

The previous prime is 1730700744719. The next prime is 1730700744727. The reversal of 1730700744721 is 1274470070371.

The square root of 1730700744721 is 1315561.

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

It can be written as a sum of positive squares in 4 ways, for example, as 9146818321 + 1721553926400 = 95639^2 + 1312080^2 .

It is not a de Polignac number, because 1730700744721 - 2¹ = 1730700744719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1730700744727) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 17051695 + ... + 17152891.

It is an arithmetic number, because the mean of its divisors is an integer number (208232324809).

Almost surely, 2^{1730700744721} is an apocalyptic number.

1730700744721 is the 1315561-st square number.

1730700744721 is the 657781-st centered octagonal number.

It is an amenable number.

1730700744721 is a deficient number, since it is larger than the sum of its proper divisors (143390178560).

1730700744721 is an frugal number, since it uses more digits than its factorization.

1730700744721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202420 (or 101210 counting only the distinct ones).

The product of its (nonzero) digits is 230496, while the sum is 43.

The spelling of 1730700744721 in words is "one trillion, seven hundred thirty billion, seven hundred million, seven hundred forty-four thousand, seven hundred twenty-one".