13555055808 has 840 divisors, whose sum is σ = 51335860752. Its totient is φ = 3511517184.

The previous prime is 13555055743. The next prime is 13555055827. The reversal of 13555055808 is 80855055531.

It is a happy number.

13555055808 is a `hidden beast` number, since 13 + 5 + 5 + 50 + 5 + 580 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 185685660 + ... + 185685732.

Almost surely, 2^13555055808 is an apocalyptic number.

13555055808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13555055808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25667930376).

13555055808 is an abundant number, since it is smaller than the sum of its proper divisors (37780804944).

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

13555055808 is a wasteful number, since it uses less digits than its factorization.

13555055808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 145 counting only the distinct ones).

The product of its (nonzero) digits is 600000, while the sum is 45.

The spelling of 13555055808 in words is "thirteen billion, five hundred fifty-five million, fifty-five thousand, eight hundred eight".