68689032768 has 42 divisors (see below), whose sum is σ = 196884711894. Its totient is φ = 22896344064.

The previous prime is 68689032761. The next prime is 68689032799. The reversal of 68689032768 is 86723098686.

It can be written as a sum of positive squares in only one way, i.e., 53394269184 + 15294763584 = 231072^2 + 123672^2 .

It is not an unprimeable number, because it can be changed into a prime (68689032761) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 59625321 + ... + 59626472.

Almost surely, 2^68689032768 is an apocalyptic number.

It is an amenable number.

68689032768 is an abundant number, since it is smaller than the sum of its proper divisors (128195679126).

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

68689032768 is a wasteful number, since it uses less digits than its factorization.

68689032768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119251811 (or 119251798 counting only the distinct ones).

The product of its (nonzero) digits is 41803776, while the sum is 63.

The spelling of 68689032768 in words is "sixty-eight billion, six hundred eighty-nine million, thirty-two thousand, seven hundred sixty-eight".