811688065105 has 16 divisors (see below), whose sum is σ = 976312368000. Its totient is φ = 647827464960.

The previous prime is 811688065093. The next prime is 811688065127. The reversal of 811688065105 is 501560886118.

It is not a de Polignac number, because 811688065105 - 2³⁵ = 777328326737 is a prime.

It is a super-2 number, since 2×811688065105² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4368550 + ... + 4550560.

It is an arithmetic number, because the mean of its divisors is an integer number (61019523000).

Almost surely, 2^811688065105 is an apocalyptic number.

It is an amenable number.

811688065105 is a deficient number, since it is larger than the sum of its proper divisors (164624302895).

811688065105 is a wasteful number, since it uses less digits than its factorization.

811688065105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184104.

The product of its (nonzero) digits is 460800, while the sum is 49.

The spelling of 811688065105 in words is "eight hundred eleven billion, six hundred eighty-eight million, sixty-five thousand, one hundred five".