1616145165 has 48 divisors (see below), whose sum is σ = 2946378240. Its totient is φ = 818363520.

The previous prime is 1616145151. The next prime is 1616145173. The reversal of 1616145165 is 5615416161.

It is not a de Polignac number, because 1616145165 - 2⁶ = 1616145101 is a prime.

It is a super-2 number, since 2×1616145165² = 5223850388705754450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 63006 + ... + 84864.

It is an arithmetic number, because the mean of its divisors is an integer number (61382880).

Almost surely, 2^1616145165 is an apocalyptic number.

1616145165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1616145165 is a deficient number, since it is larger than the sum of its proper divisors (1330233075).

1616145165 is a wasteful number, since it uses less digits than its factorization.

1616145165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21954 (or 21951 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 1616145165 is about 40201.3080011086. The cubic root of 1616145165 is about 1173.5279988566.

The spelling of 1616145165 in words is "one billion, six hundred sixteen million, one hundred forty-five thousand, one hundred sixty-five".