13555645 has 16 divisors (see below), whose sum is σ = 17216640. Its totient is φ = 10217664.

The previous prime is 13555639. The next prime is 13555657. The reversal of 13555645 is 54655531.

It is a cyclic number.

It is not a de Polignac number, because 13555645 - 2¹⁵ = 13522877 is a prime.

It is a super-2 number, since 2×13555645² = 367511022732050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13555645.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27592 + ... + 28078.

It is an arithmetic number, because the mean of its divisors is an integer number (1076040).

Almost surely, 2^13555645 is an apocalyptic number.

It is an amenable number.

13555645 is a deficient number, since it is larger than the sum of its proper divisors (3660995).

13555645 is a wasteful number, since it uses less digits than its factorization.

13555645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804.

The product of its digits is 45000, while the sum is 34.

The square root of 13555645 is about 3681.7991525883. The cubic root of 13555645 is about 238.4368609298.

The spelling of 13555645 in words is "thirteen million, five hundred fifty-five thousand, six hundred forty-five".