13281131464 has 8 divisors (see below), whose sum is σ = 24902121510. Its totient is φ = 6640565728.

The previous prime is 13281131443. The next prime is 13281131483. The reversal of 13281131464 is 46413118231.

It can be written as a sum of positive squares in only one way, i.e., 12846408964 + 434722500 = 113342^2 + 20850^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830070709 + ... + 830070724.

Almost surely, 2^13281131464 is an apocalyptic number.

It is an amenable number.

13281131464 is a deficient number, since it is larger than the sum of its proper divisors (11620990046).

13281131464 is a wasteful number, since it uses less digits than its factorization.

13281131464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1660141439 (or 1660141435 counting only the distinct ones).

The product of its digits is 13824, while the sum is 34.

Adding to 13281131464 its reverse (46413118231), we get a palindrome (59694249695).

The spelling of 13281131464 in words is "thirteen billion, two hundred eighty-one million, one hundred thirty-one thousand, four hundred sixty-four".