68378499540 has 192 divisors, whose sum is σ = 232518155520. Its totient is φ = 16580298240.

The previous prime is 68378499529. The next prime is 68378499569. The reversal of 68378499540 is 4599487386.

68378499540 is a `hidden beast` number, since 6 + 8 + 3 + 7 + 84 + 9 + 9 + 540 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 397650 + ... + 543030.

It is an arithmetic number, because the mean of its divisors is an integer number (1211032060).

Almost surely, 2^68378499540 is an apocalyptic number.

68378499540 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 68378499540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116259077760).

68378499540 is an abundant number, since it is smaller than the sum of its proper divisors (164139655980).

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

68378499540 is a wasteful number, since it uses less digits than its factorization.

68378499540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145479 (or 145471 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 63.

The spelling of 68378499540 in words is "sixty-eight billion, three hundred seventy-eight million, four hundred ninety-nine thousand, five hundred forty".