68643843552 has 192 divisors, whose sum is σ = 209957832000. Its totient is φ = 21789057024.

The previous prime is 68643843529. The next prime is 68643843557. The reversal of 68643843552 is 25534834686.

68643843552 is a `hidden beast` number, since 6 + 8 + 6 + 4 + 3 + 84 + 3 + 552 = 666.

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 (68643843557) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1810324 + ... + 1847852.

It is an arithmetic number, because the mean of its divisors is an integer number (1093530375).

Almost surely, 2^68643843552 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 68643843552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104978916000).

68643843552 is an abundant number, since it is smaller than the sum of its proper divisors (141313988448).

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

68643843552 is a wasteful number, since it uses less digits than its factorization.

68643843552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37650 (or 37636 counting only the distinct ones).

The product of its digits is 16588800, while the sum is 54.

The spelling of 68643843552 in words is "sixty-eight billion, six hundred forty-three million, eight hundred forty-three thousand, five hundred fifty-two".