13056565550 has 48 divisors (see below), whose sum is σ = 28504678560. Its totient is φ = 4355544960.

The previous prime is 13056565547. The next prime is 13056565567. The reversal of 13056565550 is 5556565031.

It is a super-2 number, since 2×13056565550² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13056565498 and 13056565507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 491165 + ... + 517064.

It is an arithmetic number, because the mean of its divisors is an integer number (593847470).

Almost surely, 2^13056565550 is an apocalyptic number.

13056565550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13056565550 is an abundant number, since it is smaller than the sum of its proper divisors (15448113010).

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

13056565550 is a wasteful number, since it uses less digits than its factorization.

13056565550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008285 (or 1008280 counting only the distinct ones).

The product of its (nonzero) digits is 337500, while the sum is 41.

The spelling of 13056565550 in words is "thirteen billion, fifty-six million, five hundred sixty-five thousand, five hundred fifty".