13042540665 has 96 divisors (see below), whose sum is σ = 28230508800. Its totient is φ = 5411612160.

The previous prime is 13042540603. The next prime is 13042540691. The reversal of 13042540665 is 56604524031.

13042540665 is a `hidden beast` number, since 13 + 0 + 42 + 540 + 6 + 65 = 666.

It is not a de Polignac number, because 13042540665 - 2⁹ = 13042540153 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2454031 + ... + 2459339.

It is an arithmetic number, because the mean of its divisors is an integer number (294067800).

Almost surely, 2^13042540665 is an apocalyptic number.

13042540665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13042540665 is an abundant number, since it is smaller than the sum of its proper divisors (15187968135).

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

13042540665 is a wasteful number, since it uses less digits than its factorization.

13042540665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6047 (or 6044 counting only the distinct ones).

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

The spelling of 13042540665 in words is "thirteen billion, forty-two million, five hundred forty thousand, six hundred sixty-five".