12400044401136 has 160 divisors (see below), whose sum is σ = 36863124180480. Its totient is φ = 3518387131392.

The previous prime is 12400044401099. The next prime is 12400044401149. The reversal of 12400044401136 is 63110444000421.

It is a super-2 number, since 2×12400044401136² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51206230 + ... + 51447818.

It is an arithmetic number, because the mean of its divisors is an integer number (230394526128).

Almost surely, 2^{12400044401136} is an apocalyptic number.

12400044401136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12400044401136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18431562090240).

12400044401136 is an abundant number, since it is smaller than the sum of its proper divisors (24463079779344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12400044401136 is a wasteful number, since it uses less digits than its factorization.

12400044401136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242663 (or 242657 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

Adding to 12400044401136 its reverse (63110444000421), we get a palindrome (75510488401557).

The spelling of 12400044401136 in words is "twelve trillion, four hundred billion, forty-four million, four hundred one thousand, one hundred thirty-six".