1726345645 has 4 divisors (see below), whose sum is σ = 2071614780. Its totient is φ = 1381076512.

The previous prime is 1726345637. The next prime is 1726345679. The reversal of 1726345645 is 5465436271.

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 627953481 + 1098392164 = 25059^2 + 33142^2 .

It is a cyclic number.

It is not a de Polignac number, because 1726345645 - 2³ = 1726345637 is a prime.

It is a super-3 number, since 3×1726345645³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 172634560 + ... + 172634569.

It is an arithmetic number, because the mean of its divisors is an integer number (517903695).

Almost surely, 2^1726345645 is an apocalyptic number.

It is an amenable number.

1726345645 is a deficient number, since it is larger than the sum of its proper divisors (345269135).

1726345645 is an equidigital number, since it uses as much as digits as its factorization.

1726345645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345269134.

The product of its digits is 604800, while the sum is 43.

The square root of 1726345645 is about 41549.3158186750. The cubic root of 1726345645 is about 1199.6169251781.

The spelling of 1726345645 in words is "one billion, seven hundred twenty-six million, three hundred forty-five thousand, six hundred forty-five".