13555555553 has 4 divisors (see below), whose sum is σ = 13555914288. Its totient is φ = 13555196820.

The previous prime is 13555555549. The next prime is 13555555571. The reversal of 13555555553 is 35555555531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13555555553 - 2² = 13555555549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13555555498 and 13555555507.

It is not an unprimeable number, because it can be changed into a prime (13555555543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114983 + ... + 200828.

It is an arithmetic number, because the mean of its divisors is an integer number (3388978572).

Almost surely, 2^13555555553 is an apocalyptic number.

It is an amenable number.

13555555553 is a deficient number, since it is larger than the sum of its proper divisors (358735).

13555555553 is an equidigital number, since it uses as much as digits as its factorization.

13555555553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358734.

The product of its digits is 3515625, while the sum is 47.

The spelling of 13555555553 in words is "thirteen billion, five hundred fifty-five million, five hundred fifty-five thousand, five hundred fifty-three".