611604065 has 4 divisors (see below), whose sum is σ = 733924884. Its totient is φ = 489283248.

The previous prime is 611604041. The next prime is 611604079. The reversal of 611604065 is 560406116.

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 92083216 + 519520849 = 9596^2 + 22793^2 .

It is a cyclic number.

It is not a de Polignac number, because 611604065 - 2²⁰ = 610555489 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61160402 + ... + 61160411.

It is an arithmetic number, because the mean of its divisors is an integer number (183481221).

Almost surely, 2^611604065 is an apocalyptic number.

It is an amenable number.

611604065 is a deficient number, since it is larger than the sum of its proper divisors (122320819).

611604065 is a wasteful number, since it uses less digits than its factorization.

611604065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122320818.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 611604065 is about 24730.6300971083. The cubic root of 611604065 is about 848.8353438055.

The spelling of 611604065 in words is "six hundred eleven million, six hundred four thousand, sixty-five".