68994988920 has 768 divisors, whose sum is σ = 288371664000. Its totient is φ = 14525153280.

The previous prime is 68994988891. The next prime is 68994988939. The reversal of 68994988920 is 2988949986.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 28879086 + ... + 28881474.

Almost surely, 2^68994988920 is an apocalyptic number.

68994988920 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 68994988920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144185832000).

68994988920 is an abundant number, since it is smaller than the sum of its proper divisors (219376675080).

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

68994988920 is a wasteful number, since it uses less digits than its factorization.

68994988920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2461 (or 2440 counting only the distinct ones).

The product of its (nonzero) digits is 161243136, while the sum is 72.

The spelling of 68994988920 in words is "sixty-eight billion, nine hundred ninety-four million, nine hundred eighty-eight thousand, nine hundred twenty".