1616500712005 has 4 divisors (see below), whose sum is σ = 1939800854412. Its totient is φ = 1293200569600.

The previous prime is 1616500711981. The next prime is 1616500712069. The reversal of 1616500712005 is 5002170056161.

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 840041905444 + 776458806561 = 916538^2 + 881169^2 .

It is not a de Polignac number, because 1616500712005 - 2¹⁹ = 1616500187717 is a prime.

It is a super-2 number, since 2×1616500712005² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161650071196 + ... + 161650071205.

It is an arithmetic number, because the mean of its divisors is an integer number (484950213603).

Almost surely, 2^{1616500712005} is an apocalyptic number.

It is an amenable number.

1616500712005 is a deficient number, since it is larger than the sum of its proper divisors (323300142407).

1616500712005 is an equidigital number, since it uses as much as digits as its factorization.

1616500712005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323300142406.

The product of its (nonzero) digits is 12600, while the sum is 34.

Adding to 1616500712005 its reverse (5002170056161), we get a palindrome (6618670768166).

The spelling of 1616500712005 in words is "one trillion, six hundred sixteen billion, five hundred million, seven hundred twelve thousand, five".