12655520425 has 12 divisors (see below), whose sum is σ = 15695980636. Its totient is φ = 10122393600.

The previous prime is 12655520413. The next prime is 12655520459. The reversal of 12655520425 is 52402555621.

It can be written as a sum of positive squares in 6 ways, for example, as 3944844864 + 8710675561 = 62808^2 + 93331^2 .

It is not a de Polignac number, because 12655520425 - 2²¹ = 12653423273 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84097 + ... + 179953.

Almost surely, 2^12655520425 is an apocalyptic number.

It is an amenable number.

12655520425 is a deficient number, since it is larger than the sum of its proper divisors (3040460211).

12655520425 is an equidigital number, since it uses as much as digits as its factorization.

12655520425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101148 (or 101143 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 37.

The spelling of 12655520425 in words is "twelve billion, six hundred fifty-five million, five hundred twenty thousand, four hundred twenty-five".