616602111161 has 4 divisors (see below), whose sum is σ = 616623780132. Its totient is φ = 616580442192.

The previous prime is 616602111149. The next prime is 616602111179. The reversal of 616602111161 is 161111206616.

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 108491184400 + 508110926761 = 329380^2 + 712819^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-616602111161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616602111131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10791746 + ... + 10848731.

It is an arithmetic number, because the mean of its divisors is an integer number (154155945033).

Almost surely, 2^616602111161 is an apocalyptic number.

It is an amenable number.

616602111161 is a deficient number, since it is larger than the sum of its proper divisors (21668971).

616602111161 is a wasteful number, since it uses less digits than its factorization.

616602111161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21668970.

The product of its (nonzero) digits is 2592, while the sum is 32.

Adding to 616602111161 its reverse (161111206616), we get a palindrome (777713317777).

The spelling of 616602111161 in words is "six hundred sixteen billion, six hundred two million, one hundred eleven thousand, one hundred sixty-one".