68810690911 has 4 divisors (see below), whose sum is σ = 70670439352. Its totient is φ = 66950942472.

The previous prime is 68810690881. The next prime is 68810690953. The reversal of 68810690911 is 11909601886.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 68810690911 - 2⁷ = 68810690783 is a prime.

It is a super-2 number, since 2×68810690911² (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 (68810690981) 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 in 3 ways as a sum of consecutive naturals, for example, 929874165 + ... + 929874238.

It is an arithmetic number, because the mean of its divisors is an integer number (17667609838).

Almost surely, 2^68810690911 is an apocalyptic number.

68810690911 is a deficient number, since it is larger than the sum of its proper divisors (1859748441).

68810690911 is a wasteful number, since it uses less digits than its factorization.

68810690911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1859748440.

The product of its (nonzero) digits is 186624, while the sum is 49.

The spelling of 68810690911 in words is "sixty-eight billion, eight hundred ten million, six hundred ninety thousand, nine hundred eleven".