68724615456 has 288 divisors, whose sum is σ = 241781258880. Its totient is φ = 18601560576.

The previous prime is 68724615451. The next prime is 68724615559. The reversal of 68724615456 is 65451642786.

68724615456 is a `hidden beast` number, since 6 + 87 + 2 + 461 + 54 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

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

It is not an unprimeable number, because it can be changed into a prime (68724615451) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2167590 + ... + 2199066.

It is an arithmetic number, because the mean of its divisors is an integer number (839518260).

Almost surely, 2^68724615456 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 68724615456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120890629440).

68724615456 is an abundant number, since it is smaller than the sum of its proper divisors (173056643424).

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

68724615456 is a wasteful number, since it uses less digits than its factorization.

68724615456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31541 (or 31508 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 54.

The spelling of 68724615456 in words is "sixty-eight billion, seven hundred twenty-four million, six hundred fifteen thousand, four hundred fifty-six".