68729843490 has 256 divisors, whose sum is σ = 219481767936. Its totient is φ = 13334630400.

The previous prime is 68729843461. The next prime is 68729843491. The reversal of 68729843490 is 9434892786.

It is not an unprimeable number, because it can be changed into a prime (68729843491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4980400 + ... + 4994180.

It is an arithmetic number, because the mean of its divisors is an integer number (857350656).

Almost surely, 2^68729843490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68729843490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109740883968).

68729843490 is an abundant number, since it is smaller than the sum of its proper divisors (150751924446).

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

68729843490 is a wasteful number, since it uses less digits than its factorization.

68729843490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13953.

The product of its (nonzero) digits is 20901888, while the sum is 60.

It can be divided in two parts, 68729 and 843490, that added together give a palindrome (912219).

The spelling of 68729843490 in words is "sixty-eight billion, seven hundred twenty-nine million, eight hundred forty-three thousand, four hundred ninety".