13505540553 has 48 divisors (see below), whose sum is σ = 20095795200. Its totient is φ = 8737152480.

The previous prime is 13505540549. The next prime is 13505540561. The reversal of 13505540553 is 35504550531.

13505540553 is a `hidden beast` number, since 1 + 3 + 50 + 5 + 54 + 0 + 553 = 666.

It is not a de Polignac number, because 13505540553 - 2² = 13505540549 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13505544553) 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, 18275058 + ... + 18275796.

It is an arithmetic number, because the mean of its divisors is an integer number (418662400).

Almost surely, 2^13505540553 is an apocalyptic number.

It is an amenable number.

13505540553 is a deficient number, since it is larger than the sum of its proper divisors (6590254647).

13505540553 is a wasteful number, since it uses less digits than its factorization.

13505540553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202 (or 1199 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 36.

The spelling of 13505540553 in words is "thirteen billion, five hundred five million, five hundred forty thousand, five hundred fifty-three".