68851551082 has 4 divisors (see below), whose sum is σ = 103277326626. Its totient is φ = 34425775540.

The previous prime is 68851551073. The next prime is 68851551089. The reversal of 68851551082 is 28015515886.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 37780085641 + 31071465441 = 194371^2 + 176271^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (68851551089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17212887769 + ... + 17212887772.

Almost surely, 2^68851551082 is an apocalyptic number.

68851551082 is a deficient number, since it is larger than the sum of its proper divisors (34425775544).

68851551082 is a wasteful number, since it uses less digits than its factorization.

68851551082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34425775543.

The product of its (nonzero) digits is 768000, while the sum is 49.

The spelling of 68851551082 in words is "sixty-eight billion, eight hundred fifty-one million, five hundred fifty-one thousand, eighty-two".