13365475812 has 216 divisors, whose sum is σ = 39062552256. Its totient is φ = 3823117056.

The previous prime is 13365475801. The next prime is 13365475831. The reversal of 13365475812 is 21857456331.

It is a happy number.

13365475812 is a `hidden beast` number, since 1 + 3 + 3 + 65 + 4 + 7 + 581 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 14735463 + ... + 14736369.

Almost surely, 2^13365475812 is an apocalyptic number.

13365475812 is a gapful number since it is divisible by the number (12) 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 13365475812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19531276128).

13365475812 is an abundant number, since it is smaller than the sum of its proper divisors (25697076444).

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

13365475812 is a wasteful number, since it uses less digits than its factorization.

13365475812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027 (or 985 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The spelling of 13365475812 in words is "thirteen billion, three hundred sixty-five million, four hundred seventy-five thousand, eight hundred twelve".