68140025280 has 560 divisors, whose sum is σ = 258372132480. Its totient is φ = 16996718592.

The previous prime is 68140025279. The next prime is 68140025281. The reversal of 68140025280 is 8252004186.

It is an interprime number because it is at equal distance from previous prime (68140025279) and next prime (68140025281).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68140025281) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 40875007 + ... + 40876673.

It is an arithmetic number, because the mean of its divisors is an integer number (461378808).

Almost surely, 2^68140025280 is an apocalyptic number.

68140025280 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 68140025280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129186066240).

68140025280 is an abundant number, since it is smaller than the sum of its proper divisors (190232107200).

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

68140025280 is a wasteful number, since it uses less digits than its factorization.

68140025280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1798 (or 1779 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The spelling of 68140025280 in words is "sixty-eight billion, one hundred forty million, twenty-five thousand, two hundred eighty".