1616384617 has 4 divisors (see below), whose sum is σ = 1616472196. Its totient is φ = 1616297040.

The previous prime is 1616384611. The next prime is 1616384621. The reversal of 1616384617 is 7164836161.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7164836161 = 7 ⋅1023548023.

It can be written as a sum of positive squares in 2 ways, for example, as 1464133696 + 152250921 = 38264^2 + 12339^2 .

It is a cyclic number.

It is not a de Polignac number, because 1616384617 - 2⁷ = 1616384489 is a prime.

It is a super-2 number, since 2×1616384617² = 5225398460148473378, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1616384611) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4134 + ... + 57007.

It is an arithmetic number, because the mean of its divisors is an integer number (404118049).

Almost surely, 2^1616384617 is an apocalyptic number.

It is an amenable number.

1616384617 is a deficient number, since it is larger than the sum of its proper divisors (87579).

1616384617 is an equidigital number, since it uses as much as digits as its factorization.

1616384617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87578.

The product of its digits is 145152, while the sum is 43.

The square root of 1616384617 is about 40204.2860526089. The cubic root of 1616384617 is about 1173.5859535823.

The spelling of 1616384617 in words is "one billion, six hundred sixteen million, three hundred eighty-four thousand, six hundred seventeen".