616734505665 has 12 divisors (see below), whose sum is σ = 1069006476564. Its totient is φ = 328925069664.

The previous prime is 616734505657. The next prime is 616734505669. The reversal of 616734505665 is 566505437616.

616734505665 is a `hidden beast` number, since 6 + 1 + 6 + 73 + 4 + 5 + 0 + 566 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 302201973441 + 314532532224 = 549729^2 + 560832^2 .

It is not a de Polignac number, because 616734505665 - 2³ = 616734505657 is a prime.

It is a super-2 number, since 2×616734505665² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (616734505669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6852605574 + ... + 6852605663.

It is an arithmetic number, because the mean of its divisors is an integer number (89083873047).

Almost surely, 2^616734505665 is an apocalyptic number.

It is an amenable number.

616734505665 is a deficient number, since it is larger than the sum of its proper divisors (452271970899).

616734505665 is a wasteful number, since it uses less digits than its factorization.

616734505665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13705211248 (or 13705211245 counting only the distinct ones).

The product of its (nonzero) digits is 13608000, while the sum is 54.

The spelling of 616734505665 in words is "six hundred sixteen billion, seven hundred thirty-four million, five hundred five thousand, six hundred sixty-five".