68389774867508 has 24 divisors (see below), whose sum is σ = 126378581196000. Its totient is φ = 32292963582048.

The previous prime is 68389774867483. The next prime is 68389774867657. The reversal of 68389774867508 is 80576847798386.

It is a super-2 number, since 2×68389774867508² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68389774867508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1419322058 + ... + 1419370241.

It is an arithmetic number, because the mean of its divisors is an integer number (5265774216500).

Almost surely, 2^{68389774867508} is an apocalyptic number.

It is an amenable number.

68389774867508 is a deficient number, since it is larger than the sum of its proper divisors (57988806328492).

68389774867508 is a wasteful number, since it uses less digits than its factorization.

68389774867508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2838692639 (or 2838692637 counting only the distinct ones).

The product of its (nonzero) digits is 27311800320, while the sum is 86.

The spelling of 68389774867508 in words is "sixty-eight trillion, three hundred eighty-nine billion, seven hundred seventy-four million, eight hundred sixty-seven thousand, five hundred eight".