68828882887 has 4 divisors (see below), whose sum is σ = 68829876360. Its totient is φ = 68827889416.

The previous prime is 68828882861. The next prime is 68828882909. The reversal of 68828882887 is 78828882886.

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-68828882887 is a prime.

It is a super-2 number, since 2×68828882887² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68828882807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 384337 + ... + 534202.

It is an arithmetic number, because the mean of its divisors is an integer number (17207469090).

Almost surely, 2^68828882887 is an apocalyptic number.

68828882887 is a deficient number, since it is larger than the sum of its proper divisors (993473).

68828882887 is an equidigital number, since it uses as much as digits as its factorization.

68828882887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993472.

The product of its digits is 352321536, while the sum is 73.

Subtracting 68828882887 from its reverse (78828882886), we obtain a palindrome (9999999999).

The spelling of 68828882887 in words is "sixty-eight billion, eight hundred twenty-eight million, eight hundred eighty-two thousand, eight hundred eighty-seven".