68819475312 has 300 divisors, whose sum is σ = 243902473320. Its totient is φ = 18627501312.

The previous prime is 68819475311. The next prime is 68819475337. The reversal of 68819475312 is 21357491886.

68819475312 is a `hidden beast` number, since 68 + 8 + 1 + 9 + 47 + 531 + 2 = 666.

It is a super-2 number, since 2×68819475312² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68819475311) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 1178058 + ... + 1235094.

Almost surely, 2^68819475312 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 68819475312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121951236660).

68819475312 is an abundant number, since it is smaller than the sum of its proper divisors (175082998008).

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

68819475312 is a wasteful number, since it uses less digits than its factorization.

68819475312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57090 (or 57068 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The spelling of 68819475312 in words is "sixty-eight billion, eight hundred nineteen million, four hundred seventy-five thousand, three hundred twelve".