6161616 has 80 divisors (see below), whose sum is σ = 18748800. Its totient is φ = 1930752.

The previous prime is 6161609. The next prime is 6161629.

6161616 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

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

6161616 is an undulating number in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 6161616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6925 + ... + 7763.

It is an arithmetic number, because the mean of its divisors is an integer number (234360).

Almost surely, 2^6161616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6161616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9374400).

6161616 is an abundant number, since it is smaller than the sum of its proper divisors (12587184).

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

6161616 is a wasteful number, since it uses less digits than its factorization.

6161616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873 (or 861 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 6161616 is about 2482.2602603273. The cubic root of 6161616 is about 183.3291576643.

The spelling of 6161616 in words is "six million, one hundred sixty-one thousand, six hundred sixteen".