68918289900 has 144 divisors (see below), whose sum is σ = 205880156160. Its totient is φ = 17788377600.

The previous prime is 68918289863. The next prime is 68918289949. The reversal of 68918289900 is 998281986.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1540041 + ... + 1584159.

Almost surely, 2^68918289900 is an apocalyptic number.

68918289900 is a gapful number since it is divisible by the number (60) 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 68918289900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102940078080).

68918289900 is an abundant number, since it is smaller than the sum of its proper divisors (136961866260).

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

68918289900 is a wasteful number, since it uses less digits than its factorization.

68918289900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44304 (or 44297 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 60.

The spelling of 68918289900 in words is "sixty-eight billion, nine hundred eighteen million, two hundred eighty-nine thousand, nine hundred".