13651505505 has 72 divisors (see below), whose sum is σ = 26805939264. Its totient is φ = 6618736800.

The previous prime is 13651505467. The next prime is 13651505519. The reversal of 13651505505 is 50550515631.

13651505505 is a `hidden beast` number, since 1 + 3 + 6 + 51 + 50 + 550 + 5 = 666.

13651505505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13651505505 - 2⁸ = 13651505249 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13651505505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 341940 + ... + 379770.

It is an arithmetic number, because the mean of its divisors is an integer number (372304712).

Almost surely, 2^13651505505 is an apocalyptic number.

13651505505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13651505505 is a deficient number, since it is larger than the sum of its proper divisors (13154433759).

13651505505 is an frugal number, since it uses more digits than its factorization.

13651505505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37871 (or 37850 counting only the distinct ones).

The product of its (nonzero) digits is 56250, while the sum is 36.

The spelling of 13651505505 in words is "thirteen billion, six hundred fifty-one million, five hundred five thousand, five hundred five".