13544011421 has 4 divisors (see below), whose sum is σ = 13544274492. Its totient is φ = 13543748352.

The previous prime is 13544011373. The next prime is 13544011427. The reversal of 13544011421 is 12411044531.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4559625625 + 8984385796 = 67525^2 + 94786^2 .

It is a cyclic number.

It is not a de Polignac number, because 13544011421 - 2¹⁴ = 13543995037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13544011427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26180 + ... + 166653.

It is an arithmetic number, because the mean of its divisors is an integer number (3386068623).

Almost surely, 2^13544011421 is an apocalyptic number.

It is an amenable number.

13544011421 is a deficient number, since it is larger than the sum of its proper divisors (263071).

13544011421 is an equidigital number, since it uses as much as digits as its factorization.

13544011421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263070.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 13544011421 its reverse (12411044531), we get a palindrome (25955055952).

The spelling of 13544011421 in words is "thirteen billion, five hundred forty-four million, eleven thousand, four hundred twenty-one".