12752281477 has 4 divisors (see below), whose sum is σ = 13733226220. Its totient is φ = 11771336736.

The previous prime is 12752281463. The next prime is 12752281481. The reversal of 12752281477 is 77418225721.

12752281477 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 112926²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1886512356 + 10865769121 = 43434^2 + 104239^2 .

It is a cyclic number.

It is not a de Polignac number, because 12752281477 - 2¹⁹ = 12751757189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12752281277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 490472352 + ... + 490472377.

It is an arithmetic number, because the mean of its divisors is an integer number (3433306555).

Almost surely, 2^12752281477 is an apocalyptic number.

It is an amenable number.

12752281477 is a deficient number, since it is larger than the sum of its proper divisors (980944743).

12752281477 is an equidigital number, since it uses as much as digits as its factorization.

12752281477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980944742.

The product of its digits is 439040, while the sum is 46.

The spelling of 12752281477 in words is "twelve billion, seven hundred fifty-two million, two hundred eighty-one thousand, four hundred seventy-seven".