11711875681 has 12 divisors (see below), whose sum is σ = 12886276900. Its totient is φ = 10636496640.

The previous prime is 11711875673. The next prime is 11711875687. The reversal of 11711875681 is 18657811711.

It can be written as a sum of positive squares in 2 ways, for example, as 6351293025 + 5360582656 = 79695^2 + 73216^2 .

It is not a de Polignac number, because 11711875681 - 2³ = 11711875673 is a prime.

It is a super-2 number, since 2×11711875681² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11711875687) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74125 + ... + 170053.

Almost surely, 2^11711875681 is an apocalyptic number.

11711875681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11711875681 is a deficient number, since it is larger than the sum of its proper divisors (1174401219).

11711875681 is a wasteful number, since it uses less digits than its factorization.

11711875681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96960 (or 96949 counting only the distinct ones).

The product of its digits is 94080, while the sum is 46.

The spelling of 11711875681 in words is "eleven billion, seven hundred eleven million, eight hundred seventy-five thousand, six hundred eighty-one".