12541628779055 has 32 divisors (see below), whose sum is σ = 16091151043968. Its totient is φ = 9360774860800.

The previous prime is 12541628779051. The next prime is 12541628779073. The reversal of 12541628779055 is 55097782614521.

It is not a de Polignac number, because 12541628779055 - 2² = 12541628779051 is a prime.

It is a super-2 number, since 2×12541628779055² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12541628779051) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 19682717 + ... + 20309913.

It is an arithmetic number, because the mean of its divisors is an integer number (502848470124).

Almost surely, 2^{12541628779055} is an apocalyptic number.

12541628779055 is a deficient number, since it is larger than the sum of its proper divisors (3549522264913).

12541628779055 is a wasteful number, since it uses less digits than its factorization.

12541628779055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631507.

The product of its (nonzero) digits is 42336000, while the sum is 62.

The spelling of 12541628779055 in words is "twelve trillion, five hundred forty-one billion, six hundred twenty-eight million, seven hundred seventy-nine thousand, fifty-five".