13555400421544 has 16 divisors (see below), whose sum is σ = 25722597186720. Its totient is φ = 6696041171760.

The previous prime is 13555400421523. The next prime is 13555400421553. The reversal of 13555400421544 is 44512400455531.

It is a self number, because there is not a number n which added to its sum of digits gives 13555400421544.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10207379172 + ... + 10207380499.

It is an arithmetic number, because the mean of its divisors is an integer number (1607662324170).

Almost surely, 2^{13555400421544} is an apocalyptic number.

It is an amenable number.

13555400421544 is a deficient number, since it is larger than the sum of its proper divisors (12167196765176).

13555400421544 is a wasteful number, since it uses less digits than its factorization.

13555400421544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20414759760 (or 20414759756 counting only the distinct ones).

The product of its (nonzero) digits is 960000, while the sum is 43.

The spelling of 13555400421544 in words is "thirteen trillion, five hundred fifty-five billion, four hundred million, four hundred twenty-one thousand, five hundred forty-four".