13644556450545 has 16 divisors (see below), whose sum is σ = 21833459161920. Its totient is φ = 7276373826624.

The previous prime is 13644556450531. The next prime is 13644556450571. The reversal of 13644556450545 is 54505465544631.

It is not a de Polignac number, because 13644556450545 - 2¹⁴ = 13644556434161 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45028150 + ... + 45330159.

It is an arithmetic number, because the mean of its divisors is an integer number (1364591197620).

Almost surely, 2^{13644556450545} is an apocalyptic number.

13644556450545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13644556450545 is a deficient number, since it is larger than the sum of its proper divisors (8188902711375).

13644556450545 is a wasteful number, since it uses less digits than its factorization.

13644556450545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90368384.

The product of its (nonzero) digits is 86400000, while the sum is 57.

The spelling of 13644556450545 in words is "thirteen trillion, six hundred forty-four billion, five hundred fifty-six million, four hundred fifty thousand, five hundred forty-five".