68715264317680 has 20 divisors (see below), whose sum is σ = 159762989538792. Its totient is φ = 27486105727040.

The previous prime is 68715264317657. The next prime is 68715264317701. The reversal of 68715264317680 is 8671346251786.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 429470401906 + ... + 429470402065.

Almost surely, 2^{68715264317680} is an apocalyptic number.

It is an amenable number.

68715264317680 is an abundant number, since it is smaller than the sum of its proper divisors (91047725221112).

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

68715264317680 is a wasteful number, since it uses less digits than its factorization.

68715264317680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858940803984 (or 858940803978 counting only the distinct ones).

The product of its (nonzero) digits is 81285120, while the sum is 64.

The spelling of 68715264317680 in words is "sixty-eight trillion, seven hundred fifteen billion, two hundred sixty-four million, three hundred seventeen thousand, six hundred eighty".