611231605505 has 8 divisors (see below), whose sum is σ = 733482699624. Its totient is φ = 488982102400.

The previous prime is 611231605489. The next prime is 611231605571. The reversal of 611231605505 is 505506132116.

It can be written as a sum of positive squares in 4 ways, for example, as 105071925904 + 506159679601 = 324148^2 + 711449^2 .

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

It is not a de Polignac number, because 611231605505 - 2⁴ = 611231605489 is a prime.

It is a Duffinian number.

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, 746915 + ... + 1334295.

It is an arithmetic number, because the mean of its divisors is an integer number (91685337453).

Almost surely, 2^611231605505 is an apocalyptic number.

It is an amenable number.

611231605505 is a deficient number, since it is larger than the sum of its proper divisors (122251094119).

611231605505 is a wasteful number, since it uses less digits than its factorization.

611231605505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795507.

The product of its (nonzero) digits is 27000, while the sum is 35.

The spelling of 611231605505 in words is "six hundred eleven billion, two hundred thirty-one million, six hundred five thousand, five hundred five".