6611856250609 has 7 divisors (see below), whose sum is σ = 6660472840687. Its totient is φ = 6563594526152.

The previous prime is 6611856250603. The next prime is 6611856250627. The reversal of 6611856250609 is 9060526581166.

The square root of 6611856250609 is 2571353.

The cubic root of 6611856250609 is 18769.

It is a perfect power (a square, a cube, a 6-th power), and thus also a powerful number.

6611856250609 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 1642844610225 + 4969011640384 = 1281735^2 + 2229128^2 .

It is not a de Polignac number, because 6611856250609 - 2⁷ = 6611856250481 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6611856250609.

It is not an unprimeable number, because it can be changed into a prime (6611856250603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 6 ways as a sum of consecutive naturals, for example, 48261724389 + ... + 48261724525.

Almost surely, 2^{6611856250609} is an apocalyptic number.

6611856250609 is the 2571353-rd square number.

6611856250609 is the 1285677-th centered octagonal number.

It is an amenable number.

6611856250609 is a deficient number, since it is larger than the sum of its proper divisors (48616590078).

6611856250609 is an frugal number, since it uses more digits than its factorization.

6611856250609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 55.

The spelling of 6611856250609 in words is "six trillion, six hundred eleven billion, eight hundred fifty-six million, two hundred fifty thousand, six hundred nine".