68836615440 has 160 divisors (see below), whose sum is σ = 230104022400. Its totient is φ = 16966103040.

The previous prime is 68836615423. The next prime is 68836615451. The reversal of 68836615440 is 4451663886.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2866 + ... + 371054.

It is an arithmetic number, because the mean of its divisors is an integer number (1438150140).

Almost surely, 2^68836615440 is an apocalyptic number.

68836615440 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 68836615440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115052011200).

68836615440 is an abundant number, since it is smaller than the sum of its proper divisors (161267406960).

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

68836615440 is a wasteful number, since it uses less digits than its factorization.

68836615440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368265 (or 368259 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 51.

The spelling of 68836615440 in words is "sixty-eight billion, eight hundred thirty-six million, six hundred fifteen thousand, four hundred forty".