68651735538 has 16 divisors (see below), whose sum is σ = 137318186016. Its totient is φ = 22881459360.

The previous prime is 68651735501. The next prime is 68651735573. The reversal of 68651735538 is 83553715686.

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, 552003 + ... + 664838.

It is an arithmetic number, because the mean of its divisors is an integer number (8582386626).

Almost surely, 2^68651735538 is an apocalyptic number.

68651735538 is an abundant number, since it is smaller than the sum of its proper divisors (68666450478).

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

68651735538 is a wasteful number, since it uses less digits than its factorization.

68651735538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226249.

The product of its digits is 18144000, while the sum is 57.

The spelling of 68651735538 in words is "sixty-eight billion, six hundred fifty-one million, seven hundred thirty-five thousand, five hundred thirty-eight".