13405044555 has 48 divisors (see below), whose sum is σ = 27004872960. Its totient is φ = 6024147264.

The previous prime is 13405044533. The next prime is 13405044571. The reversal of 13405044555 is 55544050431.

13405044555 is a `hidden beast` number, since 13 + 4 + 0 + 50 + 44 + 555 = 666.

It is not a de Polignac number, because 13405044555 - 2⁷ = 13405044427 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 342057 + ... + 379226.

It is an arithmetic number, because the mean of its divisors is an integer number (562601520).

Almost surely, 2^13405044555 is an apocalyptic number.

13405044555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13405044555 is an abundant number, since it is smaller than the sum of its proper divisors (13599828405).

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

13405044555 is a wasteful number, since it uses less digits than its factorization.

13405044555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721360 (or 721357 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 36.

Adding to 13405044555 its reverse (55544050431), we get a palindrome (68949094986).

The spelling of 13405044555 in words is "thirteen billion, four hundred five million, forty-four thousand, five hundred fifty-five".