1611345513 has 4 divisors (see below), whose sum is σ = 2148460688. Its totient is φ = 1074230340.

The previous prime is 1611345503. The next prime is 1611345529. The reversal of 1611345513 is 3155431161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1611345513 - 2⁵ = 1611345481 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1611345503) by changing a digit.

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, 268557583 + ... + 268557588.

It is an arithmetic number, because the mean of its divisors is an integer number (537115172).

Almost surely, 2^1611345513 is an apocalyptic number.

It is an amenable number.

1611345513 is a deficient number, since it is larger than the sum of its proper divisors (537115175).

1611345513 is an equidigital number, since it uses as much as digits as its factorization.

1611345513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537115174.

The product of its digits is 5400, while the sum is 30.

The square root of 1611345513 is about 40141.5683923785. The cubic root of 1611345513 is about 1172.3651266097.

Adding to 1611345513 its reverse (3155431161), we get a palindrome (4766776674).

The spelling of 1611345513 in words is "one billion, six hundred eleven million, three hundred forty-five thousand, five hundred thirteen".