611728345 has 4 divisors (see below), whose sum is σ = 734074020. Its totient is φ = 489382672.

The previous prime is 611728339. The next prime is 611728367. The reversal of 611728345 is 543827116.

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 222218649 + 389509696 = 14907^2 + 19736^2 .

It is a cyclic number.

It is not a de Polignac number, because 611728345 - 2¹⁵ = 611695577 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61172830 + ... + 61172839.

It is an arithmetic number, because the mean of its divisors is an integer number (183518505).

Almost surely, 2^611728345 is an apocalyptic number.

It is an amenable number.

611728345 is a deficient number, since it is larger than the sum of its proper divisors (122345675).

611728345 is a wasteful number, since it uses less digits than its factorization.

611728345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122345674.

The product of its digits is 40320, while the sum is 37.

The square root of 611728345 is about 24733.1426430205. The cubic root of 611728345 is about 848.8928353090.

The spelling of 611728345 in words is "six hundred eleven million, seven hundred twenty-eight thousand, three hundred forty-five".