618039817668 has 288 divisors, whose sum is σ = 1937615144192. Its totient is φ = 161747020800.

The previous prime is 618039817667. The next prime is 618039817691. The reversal of 618039817668 is 866718930816.

618039817668 is a `hidden beast` number, since 6 + 18 + 0 + 398 + 176 + 68 = 666.

618039817668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (618039817663) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 381269898 + ... + 381271518.

Almost surely, 2^618039817668 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 618039817668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (968807572096).

618039817668 is an abundant number, since it is smaller than the sum of its proper divisors (1319575326524).

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

618039817668 is a wasteful number, since it uses less digits than its factorization.

618039817668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2475 (or 2470 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 63.

The spelling of 618039817668 in words is "six hundred eighteen billion, thirty-nine million, eight hundred seventeen thousand, six hundred sixty-eight".