1611606065 has 8 divisors (see below), whose sum is σ = 1981096488. Its totient is φ = 1257838720.

The previous prime is 1611606053. The next prime is 1611606089. The reversal of 1611606065 is 5606061161.

It can be written as a sum of positive squares in 4 ways, for example, as 18079504 + 1593526561 = 4252^2 + 39919^2 .

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

It is not a de Polignac number, because 1611606065 - 2¹² = 1611601969 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3930542 + ... + 3930951.

It is an arithmetic number, because the mean of its divisors is an integer number (247637061).

Almost surely, 2^1611606065 is an apocalyptic number.

It is an amenable number.

1611606065 is a deficient number, since it is larger than the sum of its proper divisors (369490423).

1611606065 is an equidigital number, since it uses as much as digits as its factorization.

1611606065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7861539.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 1611606065 is about 40144.8136749942. The cubic root of 1611606065 is about 1172.4283130613.

The spelling of 1611606065 in words is "one billion, six hundred eleven million, six hundred six thousand, sixty-five".