13555332421078 has 16 divisors (see below), whose sum is σ = 23241529211040. Its totient is φ = 5808474058176.

The previous prime is 13555332421027. The next prime is 13555332421079. The reversal of 13555332421078 is 87012423355531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13555332421079) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 79421901 + ... + 79592392.

It is an arithmetic number, because the mean of its divisors is an integer number (1452595575690).

Almost surely, 2^{13555332421078} is an apocalyptic number.

13555332421078 is a deficient number, since it is larger than the sum of its proper divisors (9686196789962).

13555332421078 is a wasteful number, since it uses less digits than its factorization.

13555332421078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159020391.

The product of its (nonzero) digits is 3024000, while the sum is 49.

The spelling of 13555332421078 in words is "thirteen trillion, five hundred fifty-five billion, three hundred thirty-two million, four hundred twenty-one thousand, seventy-eight".