611121065 has 4 divisors (see below), whose sum is σ = 733345284. Its totient is φ = 488896848.

The previous prime is 611121061. The next prime is 611121101. The reversal of 611121065 is 560121116.

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 416323216 + 194797849 = 20404^2 + 13957^2 .

It is a cyclic number.

It is not a de Polignac number, because 611121065 - 2² = 611121061 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 611121065.

It is not an unprimeable number, because it can be changed into a prime (611121061) by changing a digit.

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, 61112102 + ... + 61112111.

It is an arithmetic number, because the mean of its divisors is an integer number (183336321).

Almost surely, 2^611121065 is an apocalyptic number.

It is an amenable number.

611121065 is a deficient number, since it is larger than the sum of its proper divisors (122224219).

611121065 is a wasteful number, since it uses less digits than its factorization.

611121065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122224218.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 611121065 is about 24720.8629501480. The cubic root of 611121065 is about 848.6118356745.

The spelling of 611121065 in words is "six hundred eleven million, one hundred twenty-one thousand, sixty-five".