13555332421545 has 16 divisors (see below), whose sum is σ = 22964327867520. Its totient is φ = 6804245293824.

The previous prime is 13555332421457. The next prime is 13555332421549. The reversal of 13555332421545 is 54512423355531.

It is not a de Polignac number, because 13555332421545 - 2¹⁰ = 13555332420521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13555332421494 and 13555332421503.

It is not an unprimeable number, because it can be changed into a prime (13555332421549) 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 15 ways as a sum of consecutive naturals, for example, 26579082925 + ... + 26579083434.

It is an arithmetic number, because the mean of its divisors is an integer number (1435270491720).

Almost surely, 2^{13555332421545} is an apocalyptic number.

13555332421545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13555332421545 is a deficient number, since it is larger than the sum of its proper divisors (9408995445975).

13555332421545 is a wasteful number, since it uses less digits than its factorization.

13555332421545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53158166384.

The product of its digits is 5400000, while the sum is 48.

The spelling of 13555332421545 in words is "thirteen trillion, five hundred fifty-five billion, three hundred thirty-two million, four hundred twenty-one thousand, five hundred forty-five".