11872063681 has 3 divisors (see below), whose sum is σ = 11872172641. Its totient is φ = 11871954722.

The previous prime is 11872063669. The next prime is 11872063729. The reversal of 11872063681 is 18636027811.

The square root of 11872063681 is 108959.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 11872063681 - 2²³ = 11863675073 is a prime.

It is a super-2 number, since 2×11872063681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11872063601) by changing a digit.

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 2 ways as a sum of consecutive naturals, for example, 54480 + ... + 163438.

Almost surely, 2^11872063681 is an apocalyptic number.

11872063681 is the 108959-th square number.

11872063681 is the 54480-th centered octagonal number.

It is an amenable number.

11872063681 is a deficient number, since it is larger than the sum of its proper divisors (108960).

11872063681 is an frugal number, since it uses more digits than its factorization.

11872063681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217918 (or 108959 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 43.

The spelling of 11872063681 in words is "eleven billion, eight hundred seventy-two million, sixty-three thousand, six hundred eighty-one".