68253845480640 has 168 divisors, whose sum is σ = 234778318341840. Its totient is φ = 18199976577024.

The previous prime is 68253845480599. The next prime is 68253845480713. The reversal of 68253845480640 is 4608454835286.

68253845480640 is a `hidden beast` number, since 6 + 8 + 2 + 5 + 3 + 84 + 548 + 0 + 6 + 4 + 0 = 666.

It is a super-2 number, since 2×68253845480640² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49953442 + ... + 51301598.

It is an arithmetic number, because the mean of its divisors is an integer number (1397489990130).

Almost surely, 2^{68253845480640} is an apocalyptic number.

68253845480640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68253845480640 is an abundant number, since it is smaller than the sum of its proper divisors (166524472861200).

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

68253845480640 is a wasteful number, since it uses less digits than its factorization.

68253845480640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365759 (or 1365746 counting only the distinct ones).

The product of its (nonzero) digits is 176947200, while the sum is 63.

The spelling of 68253845480640 in words is "sixty-eight trillion, two hundred fifty-three billion, eight hundred forty-five million, four hundred eighty thousand, six hundred forty".