618668063728 has 160 divisors (see below), whose sum is σ = 1424023856640. Its totient is φ = 256685614080.

The previous prime is 618668063701. The next prime is 618668063743. The reversal of 618668063728 is 827360866816.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75268803 + ... + 75277021.

It is an arithmetic number, because the mean of its divisors is an integer number (8900149104).

Almost surely, 2^618668063728 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 618668063728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (712011928320).

618668063728 is an abundant number, since it is smaller than the sum of its proper divisors (805355792912).

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

618668063728 is a wasteful number, since it uses less digits than its factorization.

618668063728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8615 (or 8609 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 61.

The spelling of 618668063728 in words is "six hundred eighteen billion, six hundred sixty-eight million, sixty-three thousand, seven hundred twenty-eight".