13145510565 has 24 divisors (see below), whose sum is σ = 24856966368. Its totient is φ = 6373580640.

The previous prime is 13145510557. The next prime is 13145510591. The reversal of 13145510565 is 56501554131.

13145510565 is a `hidden beast` number, since 1 + 3 + 1 + 45 + 51 + 0 + 565 = 666.

It is not a de Polignac number, because 13145510565 - 2³ = 13145510557 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13277799 + ... + 13278788.

It is an arithmetic number, because the mean of its divisors is an integer number (1035706932).

Almost surely, 2^13145510565 is an apocalyptic number.

13145510565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13145510565 is a deficient number, since it is larger than the sum of its proper divisors (11711455803).

13145510565 is a wasteful number, since it uses less digits than its factorization.

13145510565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26556609 (or 26556606 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The spelling of 13145510565 in words is "thirteen billion, one hundred forty-five million, five hundred ten thousand, five hundred sixty-five".