11664758281 has 6 divisors (see below), whose sum is σ = 12821593946. Its totient is φ = 10604325600.

The previous prime is 11664758251. The next prime is 11664758291. The reversal of 11664758281 is 18285746611.

It can be written as a sum of positive squares in only one way, i.e., 8424302656 + 3240455625 = 91784^2 + 56925^2 .

It is not a de Polignac number, because 11664758281 - 2⁵ = 11664758249 is a prime.

It is a super-2 number, since 2×11664758281² (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 (11664758251) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 48201360 + ... + 48201601.

Almost surely, 2^11664758281 is an apocalyptic number.

11664758281 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11664758281 is a deficient number, since it is larger than the sum of its proper divisors (1156835665).

11664758281 is an equidigital number, since it uses as much as digits as its factorization.

11664758281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96402983 (or 96402972 counting only the distinct ones).

The product of its digits is 645120, while the sum is 49.

The spelling of 11664758281 in words is "eleven billion, six hundred sixty-four million, seven hundred fifty-eight thousand, two hundred eighty-one".