68828068451 has 4 divisors (see below), whose sum is σ = 69956397504. Its totient is φ = 67699739400.

The previous prime is 68828068433. The next prime is 68828068501. The reversal of 68828068451 is 15486082886.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68828068451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68828088451) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 564164435 + ... + 564164556.

It is an arithmetic number, because the mean of its divisors is an integer number (17489099376).

Almost surely, 2^68828068451 is an apocalyptic number.

68828068451 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

68828068451 is a deficient number, since it is larger than the sum of its proper divisors (1128329053).

68828068451 is a wasteful number, since it uses less digits than its factorization.

68828068451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128329052.

The product of its (nonzero) digits is 5898240, while the sum is 56.

The spelling of 68828068451 in words is "sixty-eight billion, eight hundred twenty-eight million, sixty-eight thousand, four hundred fifty-one".