68898988866 has 64 divisors (see below), whose sum is σ = 150101123328. Its totient is φ = 21001463808.

The previous prime is 68898988843. The next prime is 68898988871. The reversal of 68898988866 is 66888989886.

68898988866 is a nontrivial binomial coefficient, being equal to C(371212, 2).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 494950 + ... + 618686.

It is an arithmetic number, because the mean of its divisors is an integer number (2345330052).

Almost surely, 2^68898988866 is an apocalyptic number.

68898988866 is the 371211-st triangular number and also the 185606-th hexagonal number.

68898988866 is an abundant number, since it is smaller than the sum of its proper divisors (81202134462).

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

68898988866 is a wasteful number, since it uses less digits than its factorization.

68898988866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123915.

The product of its digits is 4586471424, while the sum is 84.

The spelling of 68898988866 in words is "sixty-eight billion, eight hundred ninety-eight million, nine hundred eighty-eight thousand, eight hundred sixty-six".