13605055521 has 8 divisors (see below), whose sum is σ = 18157175424. Its totient is φ = 9061486320.

The previous prime is 13605055501. The next prime is 13605055523. The reversal of 13605055521 is 12555050631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13605055521 - 2⁵ = 13605055489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13605055523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2133961 + ... + 2140326.

It is an arithmetic number, because the mean of its divisors is an integer number (2269646928).

Almost surely, 2^13605055521 is an apocalyptic number.

It is an amenable number.

13605055521 is a deficient number, since it is larger than the sum of its proper divisors (4552119903).

13605055521 is a wasteful number, since it uses less digits than its factorization.

13605055521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4275351.

The product of its (nonzero) digits is 22500, while the sum is 33.

The spelling of 13605055521 in words is "thirteen billion, six hundred five million, fifty-five thousand, five hundred twenty-one".