616161616 has 20 divisors (see below), whose sum is σ = 1364358112. Its totient is φ = 264069216.

The previous prime is 616161613. The next prime is 616161619.

616161616 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (616161613) and next prime (616161619).

It is an alternating number because its digits alternate between even and odd.

616161616 is an undulating number in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616161613) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2750610 + ... + 2750833.

Almost surely, 2^616161616 is an apocalyptic number.

It is an amenable number.

616161616 is an abundant number, since it is smaller than the sum of its proper divisors (748196496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

616161616 is a wasteful number, since it uses less digits than its factorization.

616161616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5501458 (or 5501452 counting only the distinct ones).

The product of its digits is 7776, while the sum is 34.

The square root of 616161616 is about 24822.6029255596. The cubic root of 616161616 is about 850.9385784558.

The spelling of 616161616 in words is "six hundred sixteen million, one hundred sixty-one thousand, six hundred sixteen".