1724139655345 has 4 divisors (see below), whose sum is σ = 2068967586420. Its totient is φ = 1379311724272.

The previous prime is 1724139655319. The next prime is 1724139655423. The reversal of 1724139655345 is 5435569314271.

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 930914295921 + 793225359424 = 964839^2 + 890632^2 .

It is a cyclic number.

It is not a de Polignac number, because 1724139655345 - 2⁵ = 1724139655313 is a prime.

It is a super-2 number, since 2×1724139655345² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172413965530 + ... + 172413965539.

It is an arithmetic number, because the mean of its divisors is an integer number (517241896605).

Almost surely, 2^{1724139655345} is an apocalyptic number.

It is an amenable number.

1724139655345 is a deficient number, since it is larger than the sum of its proper divisors (344827931075).

1724139655345 is an equidigital number, since it uses as much as digits as its factorization.

1724139655345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344827931074.

The product of its digits is 13608000, while the sum is 55.

The spelling of 1724139655345 in words is "one trillion, seven hundred twenty-four billion, one hundred thirty-nine million, six hundred fifty-five thousand, three hundred forty-five".