13431464505 has 24 divisors (see below), whose sum is σ = 23494802760. Its totient is φ = 7097725440.

The previous prime is 13431464489. The next prime is 13431464507. The reversal of 13431464505 is 50546413431.

13431464505 is a `hidden beast` number, since 1 + 3 + 4 + 3 + 1 + 4 + 645 + 0 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 498316329 + 12933148176 = 22323^2 + 113724^2 .

It is not a de Polignac number, because 13431464505 - 2⁴ = 13431464489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13431464505.

It is not an unprimeable number, because it can be changed into a prime (13431464507) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1364256 + ... + 1374065.

It is an arithmetic number, because the mean of its divisors is an integer number (978950115).

Almost surely, 2^13431464505 is an apocalyptic number.

13431464505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13431464505 is a deficient number, since it is larger than the sum of its proper divisors (10063338255).

13431464505 is a wasteful number, since it uses less digits than its factorization.

13431464505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2738441 (or 2738438 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 13431464505 its reverse (50546413431), we get a palindrome (63977877936).

The spelling of 13431464505 in words is "thirteen billion, four hundred thirty-one million, four hundred sixty-four thousand, five hundred five".