13531142446 has 16 divisors (see below), whose sum is σ = 21013649280. Its totient is φ = 6527888640.

The previous prime is 13531142381. The next prime is 13531142447. The reversal of 13531142446 is 64424113531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13531142447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302911 + ... + 344698.

It is an arithmetic number, because the mean of its divisors is an integer number (1313353080).

Almost surely, 2^13531142446 is an apocalyptic number.

13531142446 is a deficient number, since it is larger than the sum of its proper divisors (7482506834).

13531142446 is a wasteful number, since it uses less digits than its factorization.

13531142446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647979.

The product of its digits is 34560, while the sum is 34.

Adding to 13531142446 its reverse (64424113531), we get a palindrome (77955255977).

The spelling of 13531142446 in words is "thirteen billion, five hundred thirty-one million, one hundred forty-two thousand, four hundred forty-six".