68137547056536 has 32 divisors (see below), whose sum is σ = 170344080475200. Its totient is φ = 22712487307680.

The previous prime is 68137547056517. The next prime is 68137547056577. The reversal of 68137547056536 is 63565074573186.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28112931 + ... + 30440301.

It is an arithmetic number, because the mean of its divisors is an integer number (5323252514850).

Almost surely, 2^{68137547056536} is an apocalyptic number.

It is an amenable number.

68137547056536 is an abundant number, since it is smaller than the sum of its proper divisors (102206533418664).

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

68137547056536 is a wasteful number, since it uses less digits than its factorization.

68137547056536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3547239 (or 3547235 counting only the distinct ones).

The product of its (nonzero) digits is 381024000, while the sum is 66.

The spelling of 68137547056536 in words is "sixty-eight trillion, one hundred thirty-seven billion, five hundred forty-seven million, fifty-six thousand, five hundred thirty-six".