13125440043441 has 24 divisors (see below), whose sum is σ = 20749881376224. Its totient is φ = 7928900688960.

The previous prime is 13125440043437. The next prime is 13125440043517. The reversal of 13125440043441 is 14434004452131.

It is a happy number.

13125440043441 is a `hidden beast` number, since 1 + 31 + 2 + 544 + 0 + 0 + 43 + 4 + 41 = 666.

It is not a de Polignac number, because 13125440043441 - 2² = 13125440043437 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13125440043396 and 13125440043405.

It is not an unprimeable number, because it can be changed into a prime (13125440043431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 215898276 + ... + 215959061.

It is an arithmetic number, because the mean of its divisors is an integer number (864578390676).

Almost surely, 2^{13125440043441} is an apocalyptic number.

13125440043441 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13125440043441 is a deficient number, since it is larger than the sum of its proper divisors (7624441332783).

13125440043441 is a wasteful number, since it uses less digits than its factorization.

13125440043441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431857661 (or 431857658 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

Adding to 13125440043441 its reverse (14434004452131), we get a palindrome (27559444495572).

The spelling of 13125440043441 in words is "thirteen trillion, one hundred twenty-five billion, four hundred forty million, forty-three thousand, four hundred forty-one".