1616446161 has 12 divisors (see below), whose sum is σ = 2547127440. Its totient is φ = 979664280.

The previous prime is 1616446159. The next prime is 1616446171.

1616446161 is a `hidden beast` number, since 1 + 6 + 1 + 644 + 6 + 1 + 6 + 1 = 666.

1616446161 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1616446161 - 2¹ = 1616446159 is a prime.

It is a super-2 number, since 2×1616446161² = 5225796382823275842, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1616446171) 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 11 ways as a sum of consecutive naturals, for example, 8163771 + ... + 8163968.

It is an arithmetic number, because the mean of its divisors is an integer number (212260620).

Almost surely, 2^1616446161 is an apocalyptic number.

1616446161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1616446161 is a deficient number, since it is larger than the sum of its proper divisors (930681279).

1616446161 is a wasteful number, since it uses less digits than its factorization.

1616446161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16327756 (or 16327753 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 1616446161 is about 40205.0514363556. The cubic root of 1616446161 is about 1173.6008481927.

The spelling of 1616446161 in words is "one billion, six hundred sixteen million, four hundred forty-six thousand, one hundred sixty-one".