12556331401 has 16 divisors (see below), whose sum is σ = 12982692096. Its totient is φ = 12136432896.

The previous prime is 12556331353. The next prime is 12556331407. The reversal of 12556331401 is 10413365521.

12556331401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12556331401 - 2¹⁷ = 12556200329 is a prime.

It is a super-2 number, since 2×12556331401² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12556331407) 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 15 ways as a sum of consecutive naturals, for example, 3754336 + ... + 3757678.

It is an arithmetic number, because the mean of its divisors is an integer number (811418256).

Almost surely, 2^12556331401 is an apocalyptic number.

It is an amenable number.

12556331401 is a deficient number, since it is larger than the sum of its proper divisors (426360695).

12556331401 is a wasteful number, since it uses less digits than its factorization.

12556331401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4272.

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 12556331401 its reverse (10413365521), we get a palindrome (22969696922).

The spelling of 12556331401 in words is "twelve billion, five hundred fifty-six million, three hundred thirty-one thousand, four hundred one".