6168778616 has 256 divisors, whose sum is σ = 16286054400. Its totient is φ = 2112768000.

The previous prime is 6168778613. The next prime is 6168778619.

6168778616 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (6168778613) and next prime (6168778619).

It is a super-2 number, since 2×6168778616² = 76107659226437750912, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6168778613) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23455301 + ... + 23455563.

It is an arithmetic number, because the mean of its divisors is an integer number (63617400).

Almost surely, 2^6168778616 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 6168778616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8143027200).

6168778616 is an abundant number, since it is smaller than the sum of its proper divisors (10117275784).

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

6168778616 is a wasteful number, since it uses less digits than its factorization.

6168778616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430 (or 426 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 56.

The square root of 6168778616 is about 78541.5725332769. The cubic root of 6168778616 is about 1834.0016760025.

The spelling of 6168778616 in words is "six billion, one hundred sixty-eight million, seven hundred seventy-eight thousand, six hundred sixteen".