12575561321405 has 16 divisors (see below), whose sum is σ = 15894979867200. Its totient is φ = 9524915556480.

The previous prime is 12575561321377. The next prime is 12575561321413. The reversal of 12575561321405 is 50412316557521.

It is not a de Polignac number, because 12575561321405 - 2¹² = 12575561317309 is a prime.

It is a super-2 number, since 2×12575561321405² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12575561321405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41767136 + ... + 42067145.

It is an arithmetic number, because the mean of its divisors is an integer number (993436241700).

Almost surely, 2^{12575561321405} is an apocalyptic number.

It is an amenable number.

12575561321405 is a deficient number, since it is larger than the sum of its proper divisors (3319418545795).

12575561321405 is a wasteful number, since it uses less digits than its factorization.

12575561321405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83835884.

The product of its (nonzero) digits is 1260000, while the sum is 47.

Adding to 12575561321405 its reverse (50412316557521), we get a palindrome (62987877878926).

The spelling of 12575561321405 in words is "twelve trillion, five hundred seventy-five billion, five hundred sixty-one million, three hundred twenty-one thousand, four hundred five".