13551520044 has 12 divisors (see below), whose sum is σ = 31620213464. Its totient is φ = 4517173344.

The previous prime is 13551520033. The next prime is 13551520049. The reversal of 13551520044 is 44002515531.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 13551519993 and 13551520020.

It is not an unprimeable number, because it can be changed into a prime (13551520049) 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 3 ways as a sum of consecutive naturals, for example, 564646657 + ... + 564646680.

Almost surely, 2^13551520044 is an apocalyptic number.

It is an amenable number.

13551520044 is an abundant number, since it is smaller than the sum of its proper divisors (18068693420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13551520044 is a wasteful number, since it uses less digits than its factorization.

13551520044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129293344 (or 1129293342 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 13551520044 in words is "thirteen billion, five hundred fifty-one million, five hundred twenty thousand, forty-four".