68681492928 has 84 divisors (see below), whose sum is σ = 196959756448. Its totient is φ = 22882590720.

The previous prime is 68681492927. The next prime is 68681492953. The reversal of 68681492928 is 82929418686.

68681492928 is a `hidden beast` number, since 68 + 6 + 81 + 492 + 9 + 2 + 8 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68681492921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1188873 + ... + 1245303.

Almost surely, 2^68681492928 is an apocalyptic number.

It is an amenable number.

68681492928 is an abundant number, since it is smaller than the sum of its proper divisors (128278263520).

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

68681492928 is a wasteful number, since it uses less digits than its factorization.

68681492928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58562 (or 58549 counting only the distinct ones).

The product of its digits is 23887872, while the sum is 63.

The spelling of 68681492928 in words is "sixty-eight billion, six hundred eighty-one million, four hundred ninety-two thousand, nine hundred twenty-eight".