13665504501 has 48 divisors (see below), whose sum is σ = 22692833280. Its totient is φ = 7837236000.

The previous prime is 13665504481. The next prime is 13665504511. The reversal of 13665504501 is 10540556631.

13665504501 is a `hidden beast` number, since 1 + 3 + 66 + 550 + 45 + 0 + 1 = 666.

It is not a de Polignac number, because 13665504501 - 2²⁵ = 13631950069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13665504511) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1860406 + ... + 1867736.

It is an arithmetic number, because the mean of its divisors is an integer number (472767360).

Almost surely, 2^13665504501 is an apocalyptic number.

13665504501 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13665504501 is a deficient number, since it is larger than the sum of its proper divisors (9027328779).

13665504501 is a wasteful number, since it uses less digits than its factorization.

13665504501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8358 (or 8355 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The spelling of 13665504501 in words is "thirteen billion, six hundred sixty-five million, five hundred four thousand, five hundred one".