1616500111165 has 4 divisors (see below), whose sum is σ = 1939800133404. Its totient is φ = 1293200088928.

The previous prime is 1616500111151. The next prime is 1616500111169. The reversal of 1616500111165 is 5611110056161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1203696431161 + 412803680004 = 1097131^2 + 642498^2 .

It is a cyclic number.

It is not a de Polignac number, because 1616500111165 - 2⁹ = 1616500110653 is a prime.

It is a super-2 number, since 2×1616500111165² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1616500111165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1616500111169) 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, 161650011112 + ... + 161650011121.

It is an arithmetic number, because the mean of its divisors is an integer number (484950033351).

Almost surely, 2^{1616500111165} is an apocalyptic number.

It is an amenable number.

1616500111165 is a deficient number, since it is larger than the sum of its proper divisors (323300022239).

1616500111165 is an equidigital number, since it uses as much as digits as its factorization.

1616500111165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323300022238.

The product of its (nonzero) digits is 5400, while the sum is 34.

The spelling of 1616500111165 in words is "one trillion, six hundred sixteen billion, five hundred million, one hundred eleven thousand, one hundred sixty-five".