618868612544 has 224 divisors, whose sum is σ = 1601809929216. Its totient is φ = 230219366400.

The previous prime is 618868612511. The next prime is 618868612547. The reversal of 618868612544 is 445216868816.

It is a tau number, because it is divible by the number of its divisors (224).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618868612547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 152767319 + ... + 152771369.

It is an arithmetic number, because the mean of its divisors is an integer number (7150937184).

Almost surely, 2^618868612544 is an apocalyptic number.

618868612544 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 618868612544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (800904964608).

618868612544 is an abundant number, since it is smaller than the sum of its proper divisors (982941316672).

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

618868612544 is a wasteful number, since it uses less digits than its factorization.

618868612544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5643 (or 5633 counting only the distinct ones).

The product of its digits is 17694720, while the sum is 59.

The spelling of 618868612544 in words is "six hundred eighteen billion, eight hundred sixty-eight million, six hundred twelve thousand, five hundred forty-four".