1616856117 has 4 divisors (see below), whose sum is σ = 2155808160. Its totient is φ = 1077904076.

The previous prime is 1616856089. The next prime is 1616856151. The reversal of 1616856117 is 7116586161.

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 a cyclic number.

It is not a de Polignac number, because 1616856117 - 2¹⁴ = 1616839733 is a prime.

It is a super-2 number, since 2×1616856117² = 5228447406160635378, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1616856217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269476017 + ... + 269476022.

It is an arithmetic number, because the mean of its divisors is an integer number (538952040).

Almost surely, 2^1616856117 is an apocalyptic number.

It is an amenable number.

1616856117 is a deficient number, since it is larger than the sum of its proper divisors (538952043).

1616856117 is an equidigital number, since it uses as much as digits as its factorization.

1616856117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538952042.

The product of its digits is 60480, while the sum is 42.

The square root of 1616856117 is about 40210.1494277253. The cubic root of 1616856117 is about 1173.7000543098.

The spelling of 1616856117 in words is "one billion, six hundred sixteen million, eight hundred fifty-six thousand, one hundred seventeen".