12755669481 has 63 divisors (see below), whose sum is σ = 19762343911. Its totient is φ = 8229333024.

The previous prime is 12755669467. The next prime is 12755669489. The reversal of 12755669481 is 18496655721.

It is a happy number.

The square root of 12755669481 is 112941.

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

12755669481 is a `hidden beast` number, since 1 + 2 + 7 + 556 + 6 + 9 + 4 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2449359081 + 10306310400 = 49491^2 + 101520^2 .

It is not a de Polignac number, because 12755669481 - 2¹⁵ = 12755636713 is a prime.

It is a super-2 number, since 2×12755669481² (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 (12755669489) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 143322085 + ... + 143322173.

Almost surely, 2^12755669481 is an apocalyptic number.

12755669481 is the 112941-st square number.

12755669481 is the 56471-st centered octagonal number.

It is an amenable number.

12755669481 is a deficient number, since it is larger than the sum of its proper divisors (7006674430).

12755669481 is an frugal number, since it uses more digits than its factorization.

12755669481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290 (or 139 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 54.

The spelling of 12755669481 in words is "twelve billion, seven hundred fifty-five million, six hundred sixty-nine thousand, four hundred eighty-one".