1720344541345 has 8 divisors (see below), whose sum is σ = 2064427174440. Its totient is φ = 1376266483200.

The previous prime is 1720344541337. The next prime is 1720344541387. The reversal of 1720344541345 is 5431454430271.

It can be written as a sum of positive squares in 4 ways, for example, as 9260790289 + 1711083751056 = 96233^2 + 1308084^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1720344541345 - 2³ = 1720344541337 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253456 + ... + 1872145.

It is an arithmetic number, because the mean of its divisors is an integer number (258053396805).

Almost surely, 2^{1720344541345} is an apocalyptic number.

It is an amenable number.

1720344541345 is a deficient number, since it is larger than the sum of its proper divisors (344082633095).

1720344541345 is a wasteful number, since it uses less digits than its factorization.

1720344541345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2287475.

The product of its (nonzero) digits is 806400, while the sum is 43.

The spelling of 1720344541345 in words is "one trillion, seven hundred twenty billion, three hundred forty-four million, five hundred forty-one thousand, three hundred forty-five".