68975639028 has 18 divisors (see below), whose sum is σ = 174355087634. Its totient is φ = 22991879664.

The previous prime is 68975639017. The next prime is 68975639039. The reversal of 68975639028 is 82093657986.

68975639028 is a `hidden beast` number, since 68 + 9 + 7 + 563 + 9 + 0 + 2 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (68975639017) and next prime (68975639039).

It can be written as a sum of positive squares in only one way, i.e., 42853968144 + 26121670884 = 207012^2 + 161622^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 957994951 + ... + 957995022.

Almost surely, 2^68975639028 is an apocalyptic number.

It is an amenable number.

68975639028 is an abundant number, since it is smaller than the sum of its proper divisors (105379448606).

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

68975639028 is a wasteful number, since it uses less digits than its factorization.

68975639028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1915989983 (or 1915989978 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 63.

The spelling of 68975639028 in words is "sixty-eight billion, nine hundred seventy-five million, six hundred thirty-nine thousand, twenty-eight".