13145133504 has 28 divisors (see below), whose sum is σ = 34779832904. Its totient is φ = 4381711104.

The previous prime is 13145133493. The next prime is 13145133517. The reversal of 13145133504 is 40533154131.

It is a super-4 number, since 4×13145133504⁴ (a number of 42 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34231927 + ... + 34232310.

Almost surely, 2^13145133504 is an apocalyptic number.

It is an amenable number.

13145133504 is an abundant number, since it is smaller than the sum of its proper divisors (21634699400).

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

13145133504 is an equidigital number, since it uses as much as digits as its factorization.

13145133504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68464252 (or 68464242 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

Adding to 13145133504 its reverse (40533154131), we get a palindrome (53678287635).

The spelling of 13145133504 in words is "thirteen billion, one hundred forty-five million, one hundred thirty-three thousand, five hundred four".