12435771881 has 12 divisors (see below), whose sum is σ = 14258072412. Its totient is φ = 10803926016.

The previous prime is 12435771863. The next prime is 12435771911. The reversal of 12435771881 is 18817753421.

It can be written as a sum of positive squares in 6 ways, for example, as 184824025 + 12250947856 = 13595^2 + 110684^2 .

It is not a de Polignac number, because 12435771881 - 2¹⁰ = 12435770857 is a prime.

It is a super-2 number, since 2×12435771881² (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 (12435771811) 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 11 ways as a sum of consecutive naturals, for example, 2161376 + ... + 2167121.

It is an arithmetic number, because the mean of its divisors is an integer number (1188172701).

Almost surely, 2^12435771881 is an apocalyptic number.

It is an amenable number.

12435771881 is a deficient number, since it is larger than the sum of its proper divisors (1822300531).

12435771881 is a wasteful number, since it uses less digits than its factorization.

12435771881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4328540 (or 4328527 counting only the distinct ones).

The product of its digits is 376320, while the sum is 47.

The spelling of 12435771881 in words is "twelve billion, four hundred thirty-five million, seven hundred seventy-one thousand, eight hundred eighty-one".